Avoid erasure/preErasure issues around Any in transformIsInstanceOf (… #33028

Job	Run time
test_non_bootstrapped	26m 55s
test_scala2_library_tasty	0s
test	55m 58s
test_windows_fast	0s
test_windows_full	44m 59s
community_build_a	57m 44s
community_build_b	1h 27m 8s
community_build_c	1h 4m 24s
MiMa	12m 8s
test_sbt	19m 16s
build-msi-package	0s
test_java8	0s
build-sdk-package / build	7m 48s
test-msi-package	0s
build-chocolatey-package / build	17s
test-chocolatey-package	0s
publish_nightly	0s
publish_release	0s
nightly_documentation	0s
open_issue_on_failure	0s
	6h 16m 37s

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