Enable RuboCop class structure #10922

Job	Run time
lint_ruby	19s
lint_node	28s
Ruby 3.1 on ubuntu-latest	15m 6s
build_node (ubuntu-latest)	1m 7s
Verify Jekyll website builds	7s
Ruby 3.2 on ubuntu-latest	13m 40s
build_node (macos-latest)	1m 15s
Ruby 3.3 on ubuntu-latest	10m 32s
build_node (windows-latest)	5m 28s
Ruby 3.1 on macos-latest	10m 52s
Ruby 3.2 on macos-latest	8m 38s
Ruby 3.3 on macos-latest	7m 49s
Ruby 3.1 on windows-latest	21m 15s
Ruby 3.2 on windows-latest	20m 25s
Ruby 3.3 on windows-latest	19m 7s
	2h 16m 8s

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