[infra] Add automated release PR creation script (@michelengelen)

[github-actions]

Cherry-pick of #18345

[michelengelen]

@LukasTy do you know why there are so many changes to the dependencies? Is it because we updated them in the last v8 release, but did not release v7 last week?

[LukasTy]

@LukasTy do you know why there are so many changes to the dependencies? Is it because we updated them in the last v8 release, but did not release v7 last week?

No, it's because we changed their definition to pnpm catalogs on master and you also added a dep in this PR.
We need manual adjustments to address it. 🙈

[mui-bot]

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[LukasTy]

@michelengelen I've updated the dependency situation in this PR to match the original PR as closely as possible. 😉

[LukasTy]

@michelengelen the test_package step will probably not pass, since the logic for it does not exist on this branch. 🤔
cc @Janpot Do you think it's worth backporting the bundle size reporting to the "LTS" branch?

[Janpot]

cc @Janpot Do you think it's worth backporting the bundle size reporting to the "LTS" branch?

If you expect bundle size regressions. I'm not sure it'd be worth it, but it shouldn't be too hard to do (famous last words).