Do not consider uninhabited constructors when performing exhaustive match checking #32799

Job	Run time
test	52m 57s
test_scala2_library_tasty	0s
test_windows_fast	31m 45s
test_non_bootstrapped	0s
community_build_a	50m 4s
community_build_b	1h 24m 32s
community_build_c	1h 6m 14s
MiMa	11m 13s
test_sbt	20m 49s
test_windows_full	0s
build-msi-package	0s
test_java8	0s
build-sdk-package / build	8m 9s
build-chocolatey-package / build	22s
test-chocolatey-package	0s
publish_nightly	0s
publish_release	0s
nightly_documentation	0s
open_issue_on_failure	0s
	5h 26m 5s

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