Dotty

Fix old scala runner to use correct JLine classpath (#22464) #34109

Job	Run time
test_non_bootstrapped	1s
test_windows_fast	9m 5s
test_windows_full	1s
test	1s
community_build_a	1s
community_build_c	1s
community_build_b	1s
MiMa	1s
test_sbt	1s
test_java8	0s
build-sdk-package / build	4m 50s
build-chocolatey-package / build	22s
test-chocolatey-package	0s
publish_nightly	1s
publish_release	1s
nightly_documentation	1s
open_issue_on_failure	1s
	14m 29s

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