Automatically discover children of workspace test items (#3448) #14503

Job	Run time
build_node (ubuntu-latest)	2m 33s
lint_ruby	28s
lint_node	50s
build_node (macos-latest)	3m 17s
Ruby 3.1 on ubuntu-latest	12m 6s
build_node (windows-latest)	7m 51s
Ruby 3.2 on ubuntu-latest	11m 24s
spelling	14s
Verify Jekyll website builds	25s
Ruby 3.3 on ubuntu-latest	11m 7s
Ruby 3.4 on ubuntu-latest	10m 5s
Ruby 3.1 on macos-latest	8m 14s
Ruby 3.2 on macos-latest	6m 59s
Ruby 3.3 on macos-latest	7m 53s
Ruby 3.4 on macos-latest	5m 53s
Ruby 3.1 on windows-latest	25m 39s
Ruby 3.2 on windows-latest	24m 9s
Ruby 3.3 on windows-latest	23m 57s
Ruby 3.4 on windows-latest	25m 56s
	3h 9m 0s

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