workflows: Auto go mod tidy dependabot PRs

Do to our repo structure of go modules, we frequently hit issues
that dependabout bumps versions, but other modules that reference
the changes module don't get updated, so we have error with go mod and sum
not being tidied. Attempt to create a workflow that will automatically
do this change, so that we don't need to do it manually anymore.

Signed-off-by: stevenhorsman <[email protected]>

Author: stevenhorsman

.github/workflows/dependabot_go_mod_tidy.yaml

@@ -0,0 +1,27 @@
+name: Automatically run go mod tidy on dependabot PRs
+on:
+  pull_request:
+    branches: [ main ]
+
+permissions:
+  contents: write # We need permissions to push new content to the PR
+
+jobs:
+  tidy-dependabot-pr:
+    runs-on: ubuntu-latest
+    if: github.event.pull_request.user.login == 'dependabot[bot]'
+
+    steps:
+      - name: Checkout the pull request code
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+        with:
+          persist-credentials: false
+
+      - name: Run go mod tidy
+        run: |
+          ./hack/go-tidy.sh
+
+      - name: Commit and Push Changes
+        uses: stefanzweifel/git-auto-commit-action@04702edda442b2e678b25b537cec683a1493fcb9 #v7.1.0
+        with:
+          commit_message: "chore: Auto-run go mod tidy after Dependabot update"