Switch mapping of context bounds to using clauses in 3.6 #31892

Job	Run time
test	49m 36s
test_non_bootstrapped	0s
test_scala2_library_tasty	0s
test_windows_fast	27m 35s
community_build_a	54m 53s
MiMa	7m 20s
test_windows_full	0s
community_build_b	1h 12m 17s
community_build_c	55m 47s
build-msi-package	0s
test_java8	0s
test_sbt	14m 30s
build-sdk-package / build	7m 31s
build-chocolatey-package / build	20s
test-chocolatey-package	0s
publish_release	0s
publish_nightly	0s
nightly_documentation	0s
open_issue_on_failure	0s
	4h 49m 49s

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