Restrict SetDimension method to IsFreeLeftModule (#5520) #4730

Job	Run time
testinstall - - ubuntu-latest	5m 6s
teststandard - - ubuntu-latest	32m 54s
testmanuals - - ubuntu-latest	6m 50s
testexpect testmockpkg testspecial test-compile testlibgap testkernel - - ubuntu-latest	4m 6s
testpackages testinstall-loadall - - ubuntu-latest	21m 31s
makemanuals testmakeinstall - GAPPREFIX=/tmp/gapprefix CONFIGFLAGS="--prefix=/tmp/gapprefix" NO_COVERAGE=1 - ubuntu-latest	5m 50s
teststandard - ABI=32 CONFIGFLAGS="" - ubuntu-20.04	28m 33s
testinstall - HPCGAP=yes ABI=64 - ubuntu-latest	8m 30s
testmockpkg testinstall - BOOTSTRAP_MINIMAL=yes - macos-latest	8m 25s
testbugfix - CONFIGFLAGS="--enable-memory-checking" - ubuntu-latest	23m 35s
testbuildsys testmockpkg testinstall - NO_COVERAGE=1 ABI=64 BUILDDIR=out-of-tree CONFIGFLAGS="--enable-valgrind" - ubuntu-latest	4m 18s
testbuildsys testmockpkg testinstall - NO_COVERAGE=1 ABI=32 BUILDDIR=out-of-tree CONFIGFLAGS="" - ubuntu-20.04	4m 3s
testinstall - JULIA=yes CONFIGFLAGS="--enable-debug --disable-Werror" - ubuntu-20.04	5m 1s
testmockpkg testinstall - - windows-2019	17m 25s
Send Slack notification on status change	4s
	2h 56m 11s

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