feat: Automated regeneration of language v1beta2 client #46725

Job	Run time
CI (macos-latest, 4.0, --include-spec)	32s
CI (ubuntu-latest, 3.3, --include-spec)	45s
CI (ubuntu-latest, 3.2, --include-spec)	41s
CI (ubuntu-latest, 3.4, --include-spec)	36s
CI (windows-latest, 4.0, --include-spec)	1m 47s
CI (ubuntu-latest, 4.0, --include-spec --include-yardoc --include-build, --enable-frozen-string-l...	49s
	5m 10s

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