Refactor workflow "pr-build-live-branch.yml" for reusability

[htdat]

Description

As mentioned in this PR #5768 (review), there is a need to refactor this workflow pr-build-live-branch.yml and other following workflows into composite actions for reusability.

Acceptance criteria

• release-pr.yml:
  • sharing the action bump version. The new action may just the NEW_VERSION input to update the relevant files.
• build-zip-and-run-smoke-tests.yml:
  • sharing the most parts except there is no need for smoke-tests, and a specific requirement for the shape of artifact in pr-build-live-branch.yml.
• a new composition action called: get-current-version to use across many current workflows:
  • release-pr.yml
  • pr-build-live-branch.yml
  • release-code-freeze.yml

Designs

Testing instructions

1. Go to '…'
2. Click on '…'
3. Scroll down to '…'
4. Observe expected behaviour

Dev notes

Additional context

[jessy-p]

This issue impacts Release Process, Monitoring (including On-call process ownership), MC Tools, Dev Tools, CI/CD Pipeline, and Dependencies Management, so assigning to Harmony (based on team responsibilities Pc2DNy-3z-p2) @deepakpathania. Assigning as part of Gamma Triage process PcreKM-yM-p2.

Tagging as part of re-evaluating older issues in the backlog, please have a look and close if no longer relevant.