CI: Add CLAZY_CHECKS and CLAZY_IGNORE_DIRS env vars #74

Job	Run time
build (ubuntu-22.04, Debug, static, 5.15)	4m 13s
build (ubuntu-22.04, Debug, static, 6.5.*)	5m 21s
build (ubuntu-22.04, Debug, shared, 5.15)	3m 14s
build (ubuntu-22.04, Debug, shared, 6.5.*)	5m 12s
build (ubuntu-22.04, Release, static, 5.15)	1m 17s
build (ubuntu-22.04, Release, static, 6.5.*)	1m 21s
build (ubuntu-22.04, Release, shared, 5.15)	1m 1s
build (ubuntu-22.04, Release, shared, 6.5.*)	1m 51s
build (windows-2022, Debug, static, 5.15)	14m 40s
build (windows-2022, Debug, static, 6.5.*)	17m 25s
build (windows-2022, Debug, shared, 5.15)	14m 54s
build (windows-2022, Debug, shared, 6.5.*)	16m 45s
build (windows-2022, Release, static, 5.15)	2m 6s
build (windows-2022, Release, static, 6.5.*)	2m 17s
build (windows-2022, Release, shared, 5.15)	2m 3s
build (windows-2022, Release, shared, 6.5.*)	2m 28s
build (macos-12, Debug, static, 5.15)	4m 59s
build (macos-12, Debug, static, 6.5.*)	6m 47s
build (macos-12, Debug, shared, 5.15)	3m 56s
build (macos-12, Debug, shared, 6.5.*)	7m 11s
build (macos-12, Release, static, 5.15)	2m 31s
build (macos-12, Release, static, 6.5.*)	2m 1s
build (macos-12, Release, shared, 5.15)	1m 44s
build (macos-12, Release, shared, 6.5.*)	1m 40s
	2h 6m 57s

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