chore(ci): RC builds: parallelize iOS and Android (#28693)

<!--
Please submit this PR as a draft initially.
Do not mark it as "Ready for review" until the template has been
completely filled out, and PR status checks have passed at least once.
-->

## **Description**

<!--
Write a short description of the changes included in this pull request,
also include relevant motivation and context. Have in mind the following
questions:
1. What is the reason for the change?
2. What is the improvement/solution?
-->

This change **bumps the build version once** in a dedicated job that
calls **`update-latest-build-version.yml`**, then triggers **iOS and
Android** through **`runway-ota-build-core`** in **parallel**. Both jobs
use **`skip_version_bump: true`** and **`source_branch`** set to the
**version-bump commit SHA** so both builds use the same tree. Downstream
steps (PR comment + Slack) now require **both** platform jobs to
succeed.

## **Changelog**

<!--
If this PR is not End-User-Facing and should not show up in the
CHANGELOG, you can choose to either:
1. Write `CHANGELOG entry: null`
2. Label with `no-changelog`

If this PR is End-User-Facing, please write a short User-Facing
description in the past tense like:
`CHANGELOG entry: Added a new tab for users to see their NFTs`
`CHANGELOG entry: Fixed a bug that was causing some NFTs to flicker`

(This helps the Release Engineer do their job more quickly and
accurately)
-->

CHANGELOG entry: null

## **Related issues**

Fixes: https://consensyssoftware.atlassian.net/browse/MCWP-521

## **Manual testing steps**

```gherkin
Feature: my feature name

  Scenario: user [verb for user action]
    Given [describe expected initial app state]

    When user [verb for user action]
    Then [describe expected outcome]
```

## **Screenshots/Recordings**

<!-- If applicable, add screenshots and/or recordings to visualize the
before and after of your change. -->

### **Before**

<!-- [screenshots/recordings] -->

### **After**

<!-- [screenshots/recordings] -->

## **Pre-merge author checklist**

- [ ] I've followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask Mobile
Coding
Standards](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/CODING_GUIDELINES.md).
- [ ] I've completed the PR template to the best of my ability
- [ ] I've included tests if applicable
- [ ] I've documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [ ] I've applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

## **Pre-merge reviewer checklist**

- [ ] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [ ] I confirm that this PR addresses all acceptance criteria described
in the ticket it closes and includes the necessary testing evidence such
as recordings and or screenshots.

Author: joaoloureirop

.github/workflows/build-rc-auto.yml

@@ -8,9 +8,8 @@
 # in-progress run of this workflow for that branch is cancelled (same behavior as
 # Bitrise “Rolling builds” / “Abort running builds” for one branch + one workflow).
 #
-# Builds are triggered via the Runway OTA/build pipeline (runway-ota-build-core.yml):
-# - iOS runs first and performs the version bump.
-# - Android runs after, skipping the version bump (already done by iOS).
+# Version bump runs once (update-latest-build-version.yml), then iOS and Android
+# builds are triggered in parallel via runway-ota-build-core.yml (skip_version_bump).
 #
 ##############################################################################################
 name: Auto RC builds
@@ -95,27 +94,43 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
+  update_rc_build_version:
+    name: Update RC build version
+    uses: ./.github/workflows/update-latest-build-version.yml
+    needs: validate-and-check-label
+    if: needs.validate-and-check-label.outputs.has-label == 'true'
+    permissions:
+      contents: write
+      id-token: write
+    with:
+      base-branch: ${{ needs.validate-and-check-label.outputs.branch-name }}
+    secrets:
+      PR_TOKEN: ${{ secrets.PR_TOKEN }}
+
   trigger-ios-rc-build:
     name: Trigger iOS RC Build
     uses: ./.github/workflows/runway-ota-build-core.yml
-    needs: validate-and-check-label
+    needs:
+      - validate-and-check-label
+      - update_rc_build_version
     if: needs.validate-and-check-label.outputs.has-label == 'true'
     with:
       platform: ios
-      source_branch: ${{ needs.validate-and-check-label.outputs.branch-name }}
+      source_branch: ${{ needs.update_rc_build_version.outputs.commit-hash }}
+      skip_version_bump: true
     secrets: inherit
 
   trigger-android-rc-build:
     name: Trigger Android RC Build
     uses: ./.github/workflows/runway-ota-build-core.yml
     needs:
       - validate-and-check-label
-      - trigger-ios-rc-build
+      - update_rc_build_version
     if: needs.validate-and-check-label.outputs.has-label == 'true'
     with:
       platform: android
-      source_branch: ${{ needs.validate-and-check-label.outputs.branch-name }}
-      skip_version_bump: true # iOS step already bumped the version
+      source_branch: ${{ needs.update_rc_build_version.outputs.commit-hash }}
+      skip_version_bump: true
     secrets: inherit
 
   post-rc-build-comment:
@@ -125,7 +140,7 @@ jobs:
       - validate-and-check-label
       - trigger-ios-rc-build
       - trigger-android-rc-build
-    if: always() && needs.trigger-android-rc-build.result == 'success' && needs.validate-and-check-label.outputs.pr-number != ''
+    if: always() && needs.trigger-ios-rc-build.result == 'success' && needs.trigger-android-rc-build.result == 'success' && needs.validate-and-check-label.outputs.pr-number != ''
     permissions:
       pull-requests: write
     steps:
@@ -156,7 +171,7 @@ jobs:
       - validate-and-check-label
       - trigger-ios-rc-build
       - trigger-android-rc-build
-    if: always() && needs.trigger-android-rc-build.result == 'success'
+    if: always() && needs.trigger-ios-rc-build.result == 'success' && needs.trigger-android-rc-build.result == 'success'
     uses: ./.github/workflows/slack-rc-notification.yml
     with:
       source_branch: ${{ needs.validate-and-check-label.outputs.branch-name }}