[ci] fix: merge pre-commit-full into pre-commit

[HollowMan6]

What does this PR do?

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Right now, the pre-commit-full will always fail as it doesn't install related dependencies: https://github.com/volcengine/verl/actions/runs/18251414892

And there's no reason to duplicate pre-commit for pre-commit-full as they are defined as same workflow, so this PR moves manual triggers and schedule to pre-commit and remove pre-commit-full

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