MaximalSubgroupClassReps uses AtlasRep if available (#5485) #4490

Job	Run time
testinstall - - ubuntu-latest	5m 53s
teststandard - - ubuntu-latest	24m 47s
testmanuals - - ubuntu-latest	8m 6s
testexpect testmockpkg testspecial test-compile testlibgap testkernel - - ubuntu-latest	4m 20s
testpackages testinstall-loadall - - ubuntu-latest	1h 0m 21s
makemanuals testmakeinstall - GAPPREFIX=/tmp/gapprefix CONFIGFLAGS="--prefix=/tmp/gapprefix" NO_COVERAGE=1 - ubuntu-latest	8m 4s
teststandard - ABI=32 CONFIGFLAGS="" - ubuntu-20.04	25m 40s
testinstall - HPCGAP=yes ABI=64 - ubuntu-latest	40m 22s
testmockpkg testinstall - BOOTSTRAP_MINIMAL=yes - macos-latest	8m 55s
testbugfix - CONFIGFLAGS="--enable-memory-checking" - ubuntu-latest	32m 1s
testbuildsys testmockpkg testinstall - NO_COVERAGE=1 ABI=64 BUILDDIR=out-of-tree CONFIGFLAGS="--enable-valgrind" - ubuntu-latest	4m 49s
testbuildsys testmockpkg testinstall - NO_COVERAGE=1 ABI=32 BUILDDIR=out-of-tree CONFIGFLAGS="" - ubuntu-20.04	5m 31s
testinstall - JULIA=yes CONFIGFLAGS="--enable-debug --disable-Werror" - ubuntu-20.04	15m 8s
testmockpkg testinstall - - windows-2019	14m 47s
Send Slack notification on status change	6s
	4h 18m 50s

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