PPLTypeChecker.isComparable: revert to upstream, exercise via public … #1102

Job	Run time
build-windows-macos (windows-latest, 25, -PbuildPlatform=windows, unit)	12m 27s
build-windows-macos (windows-latest, 21, -PbuildPlatform=windows, integration)	33m 58s
build-windows-macos (macos-14, 25, doc)	3m 49s
build-windows-macos (windows-latest, 25, -PbuildPlatform=windows, integration)	33m 40s
build-windows-macos (macos-14, 25, integration)	31m 12s
build-windows-macos (macos-14, 21, integration)	38m 55s
build-windows-macos (windows-latest, 21, -PbuildPlatform=windows, unit)	10m 55s
build-windows-macos (macos-14, 25, unit)	7m 57s
build-windows-macos (macos-14, 21, doc)	3m 11s
Get-CI-Image-Tag / Get-CI-Image-Tag	5s
build-windows-macos (macos-14, 21, unit)	5m 42s
bwc-tests-full-restart (21)	4m 19s
bwc-tests-full-restart (25)	4m 17s
bwc-tests-rolling-upgrade (25)	5m 11s
bwc-tests-rolling-upgrade (21)	4m 14s
build-linux (25, unit)	10m 29s
build-linux (25, doc)	5m 15s
build-linux (21, integration)	31m 15s
build-linux (21, doc)	5m 22s
build-linux (25, integration)	31m 1s
build-linux (21, unit)	10m 33s
	4h 53m 47s

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