Yaml IT - Phase 3b

[derrickaw]

Phase 3 of this document - https://s.apache.org/beam-yaml-it
#34611

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[github-actions]

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R: @jrmccluskey for label python.

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[derrickaw]

Run Python_Runners PreCommit 3.9

Run Yaml_Xlang_Direct PreCommit

[jrmccluskey]

LGTM, just one nit.