build: replace current create release pr with re-usable workflow

.github/workflows/create_release_pr.yml

@@ -7,55 +7,4 @@ on:
       - develop
 jobs:
   pull_request:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: Create or update PR
-        env:
-          GH_TOKEN: ${{ github.token }}
-        run: |
-          PR_TITLE="[automated] Merge Develop into Master"
-
-          # Extract numbers from PRs that have been merged into develop
-          PR_NUMBERS=$(gh api repos/:owner/:repo/compare/master...develop --jq '
-          .commits[]
-          | select(.commit.message
-          | startswith("Merge pull request"))
-          | .commit.message
-          | capture("#(?<pr_number>\\d+)")
-          | .pr_number'
-          )
-
-          # Fetch titles for each PR number
-          PR_NUMBERS_AND_TITLES=$(for PR_NUMBER in $PR_NUMBERS; do
-            gh pr view $PR_NUMBER --json number,title --jq '{number: .number, title: .title}'
-          done | jq -s 'sort_by(.title)')
-
-          # Sort extracted PR numbers by title
-          SORTED_PR_NUMBERS=$(jq -r '.[].number' <<< "$PR_NUMBERS_AND_TITLES")
-
-          STORIES=$(xargs -I {} gh pr view {} --json body --jq '.body | if . | test("Closes #\\d+") then capture("Closes #(?<issue_number>\\d+)") | "- #{}
-            - Closes #" + .issue_number else "- #{}" end' <<< "$SORTED_PR_NUMBERS") # Note the line-break on this line is for formatting
-
-          PR_BODY="#### Changes proposed in this pull request
-
-          $(echo "$STORIES")
-
-          #### Instructions for Reviewers
-
-          - _Check stories are ready for release._
-          - _Check for any database migrations._
-          - _Check for debug code._
-          - _Check version is appropriate._
-
-          This description will be overwritten on the next push
-          This PR was auto-generated on $(TZ=Europe/London date --iso-8601=seconds)"
-
-          # Check if a PR already exists
-          EXISTING_PR=$(gh pr list --base master --head develop --json number --jq '.[0].number')
-
-          if [ -z "$EXISTING_PR" ]; then
-            gh pr create --base master --head develop --title "$PR_TITLE" --body "$PR_BODY" --draft
-          else
-            gh pr edit "$EXISTING_PR" --body "$PR_BODY"
-          fi
+    uses: sanger/.github/.github/workflows/create-release-pr.yml@master