feat: Automated regeneration of gkehub v1beta client #47775

Job	Run time
CI (ubuntu-latest, 3.2, --include-spec)	51s
CI (ubuntu-latest, 4.0, --include-spec --include-yardoc --include-build, --enable-frozen-string-l...	59s
CI (windows-latest, 4.0, --include-spec)	1m 58s
CI (macos-latest, 4.0, --include-spec)	42s
CI (ubuntu-latest, 3.4, --include-spec)	46s
CI (ubuntu-latest, 3.3, --include-spec)	47s
	6m 3s

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