[Vcpkg] clean PR clutters commit

[FrankXie05]

Fix #37352

[dg0yt]

The problem is not in the contributor's commit messages, and thus it cannot be caught with regular PR checks because that commit message doesn't exist at that time.
The problem is in the commit message of the Squash Merge Commit which is synthetized from the initial post.

The initial post is based on the PR draft message which is unfortunately designed to have commented sections. PR checks would have to fetch the PR's comment via GH API. But you can't really suggest to remove the commented sections which were just suggested by the template.

[FrankXie05]

@dg0yt
This mechanism is mainly to prompt maintainers to check whether the body contains undeleted notes section, helping to clean up the messy information in the commit.

[Osyotr]

https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/configuring-pull-request-merges/configuring-commit-squashing-for-pull-requests

The default message uses the commit title and message if the pull request contains only 1 commit, or the pull request title and list of commits if the pull request contains 2 or more commits. You can also choose to use just the pull request title, the pull request title and commit details, >or the pull request title and description.<

I guess someone changed repository settings to this. Please change back to

pull request title and list of commits

[BillyONeal]

The problem is in the commit message of the Squash Merge Commit which is synthetized from the initial post.

I think when you first complained about this I changed it to PR title instead.

[BillyONeal]

I think this is 'the person clicking the merge button needs to do a better job' than something to complain about contributors about.

[BillyONeal]

@FrankXie05 Thanks for looking in to this. I think the problem @dg0yt was talking about should be resolved now without needing to add more bots. Thanks!