[YAML] Better docs for Filter and MapToFields. #30881

Job	Run time
Check environment variables	19s
Build python source distribution	1m 0s
Prepare GCS	0s
Build python cp39- wheels on auto for ubuntu-20.04	2m 13s
Build python cp310- wheels on auto for ubuntu-20.04	2m 12s
Build python cp311- wheels on auto for ubuntu-20.04	2m 12s
Build python cp312- wheels on auto for ubuntu-20.04	2m 13s
Build python cp39- wheels on auto for macos-13	26s
Build python cp310- wheels on auto for macos-13	21s
Build python cp311- wheels on auto for macos-13	20s
Build python cp312- wheels on auto for macos-13	2m 11s
Build python cp39- wheels on auto for windows-latest	25s
Build python cp310- wheels on auto for windows-latest	16s
Build python cp311- wheels on auto for windows-latest	25s
Upload python source distribution to GCS bucket	0s
Build python cp312- wheels on auto for windows-latest	2m 2s
Build python cp39- wheels on aarch64 for ubuntu-20.04	44s
Build python cp310- wheels on aarch64 for ubuntu-20.04	1m 6s
Build python cp311- wheels on aarch64 for ubuntu-20.04	47s
Build python cp312- wheels on aarch64 for ubuntu-20.04	1m 57s
Branch repo nightly	0s
Upload wheels to GCS bucket	0s
List files on Google Cloud Storage Bucket	0s
	21m 9s

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