test

Totally disable the DFLTCC extension before tests #304

Job	Run time
build-ibm (ubuntu-24.04-ppc64le)	35s
ruby-versions / Generate Ruby versions	3s
build-ibm (ubuntu-24.04-s390x)	28s
build (2.6 / macos-latest)	37s
build (2.5 / windows-latest)	1m 49s
build (2.5 / ubuntu-latest)	25s
build (2.6 / ubuntu-latest)	32s
build (3.0 / macos-latest)	23s
build (3.3 / macos-latest)	14s
build (3.1 / windows-latest)	1m 19s
build (2.7 / macos-latest)	30s
build (3.2 / ubuntu-latest)	14s
build (3.1 / ubuntu-latest)	14s
build (3.0 / ubuntu-latest)	14s
build (3.2 / macos-latest)	13s
build (3.0 / windows-latest)	1m 24s
build (3.4 / ubuntu-latest)	13s
build (mswin / windows-latest)	1m 20s
build (truffleruby-head / ubuntu-latest)	29s
build (2.6 / windows-latest)	2m 27s
build (head / ubuntu-latest)	11s
build (3.3 / windows-latest)	2m 14s
build (3.3 / ubuntu-latest)	15s
build (3.4 / windows-latest)	1m 4s
build (3.2 / windows-latest)	1m 2s
build (3.1 / macos-latest)	16s
build (mingw / windows-latest)	1m 1s
build (2.7 / ubuntu-latest)	34s
build (truffleruby-head / macos-latest)	25s
build (head / macos-latest)	16s
build (2.7 / windows-latest)	1m 38s
build (3.4 / macos-latest)	15s
	22m 54s

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