[llvm][GitHub] Move PR project status to Done once backport PR is made

[tstellar]

It's common to use the /cherry-pick command on a PR to create a backport request. However, this creates a lot of clutter in the LLVM Release Status project, because we end up with two items in the project, one for the original PR and one for the new PR.

This change will set the status of the original PR to Done once the new PR (for the release branch) is created. This will save release managers a lot of work of having to manually updated the status for PRs that contain backport requests.

[github-actions]

✅ With the latest revision this PR passed the Python code formatter.

[tru]

Looks good! It has been annoying to have these issues around.

[nikic]

Looks like this causes a permissions error: https://github.com/llvm/llvm-project/actions/runs/13282944762/job/37085167144

/home/runner/work/llvm-project/llvm-project/./llvm/utils/git/github-automation.py:57: SyntaxWarning: invalid escape sequence '\w'
  str = re.sub("@(?=\w)", "@<!-- -->", str)
/home/runner/work/llvm-project/llvm-project/./llvm/utils/git/github-automation.py:59: SyntaxWarning: invalid escape sequence '\d'
  str = re.sub("#(?=\d)", "#<!-- -->", str)
/home/runner/work/llvm-project/llvm-project/./llvm/utils/git/github-automation.py:632: SyntaxWarning: invalid escape sequence '\('
  m = re.search("\(cherry picked from commit ([0-9a-f]+)\)", message)
cherry-picking ['0abe058d7f99c9c7bbaf4ee98308c5e78d229897']
Pushing to https://***@github.com/llvmbot/llvm-project issue126698
{'date': 'Wed, 12 Feb 2025 10:17:02 GMT', 'content-type': 'application/json; charset=utf-8', 'x-oauth-scopes': 'project, public_repo', 'x-accepted-oauth-scopes': 'repo', 'github-authentication-token-expiration': '2025-03-04 08:00:00 UTC', 'x-github-media-type': 'github.v4; format=json', 'x-ratelimit-limit': '5000', 'x-ratelimit-remaining': '4999', 'x-ratelimit-reset': '1739359022', 'x-ratelimit-used': '1', 'x-ratelimit-resource': 'graphql', 'access-control-expose-headers': 'ETag, Link, Location, Retry-After, X-GitHub-OTP, X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Used, X-RateLimit-Resource, X-RateLimit-Reset, X-OAuth-Scopes, X-Accepted-OAuth-Scopes, X-Poll-Interval, X-GitHub-Media-Type, X-GitHub-SSO, X-GitHub-Request-Id, Deprecation, Sunset', 'access-control-allow-origin': '*', 'strict-transport-security': 'max-age=31536000; includeSubdomains; preload', 'x-frame-options': 'deny', 'x-content-type-options': 'nosniff', 'x-xss-protection': '0', 'referrer-policy': 'origin-when-cross-origin, strict-origin-when-cross-origin', 'content-security-policy': "default-src 'none'", 'vary': 'Accept-Encoding, Accept, X-Requested-With', 'content-encoding': 'gzip', 'transfer-encoding': 'chunked', 'server': 'github.com', 'x-github-request-id': 'B85D:29035E:2F60694:30CB1C9:67AC751E'}
Traceback (most recent call last):
  File "/home/runner/work/llvm-project/llvm-project/./llvm/utils/git/github-automation.py", line 932, in <module>
  File "/home/runner/work/llvm-project/llvm-project/./llvm/utils/git/github-automation.py", line 780, in execute_command
  File "/home/runner/work/llvm-project/llvm-project/./llvm/utils/git/github-automation.py", line 691, in create_branch
    "--issue-number", type=int, required=True, help="The issue number to update"
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runner/work/llvm-project/llvm-project/./llvm/utils/git/github-automation.py", line 759, in create_pull_request
    args.branch_repo,
    ^^^^^^^^^^^^^^^^^^
  File "/home/runner/work/llvm-project/llvm-project/./llvm/utils/git/github-automation.py", line 562, in update_issue_project_status
    if release_branch_for_issue is None:
                                   ^^^^^
  File "/home/runner/.local/lib/python3.12/site-packages/github/Requester.py", line 581, in graphql_query
    raise self.createException(400, response_headers, data)
github.GithubException.GithubException: 400 {"data": {"set_status": null}, "errors": [{"type": "FORBIDDEN", "path": ["set_status"], "locations": [{"line": 3, "column": 21}], "message": "llvmbot does not have the correct permissions to execute `UpdateProjectV2ItemFieldValue`"}]}

[tstellar]

@nikic I think this is fixed now, the error shouldn't impact any other parts of the script.