Merge pull request #2033 from ruby/version-3.6.0.pre.3 #5400

Job	Run time
test (3.0, test)	1m 56s
test (3.1, test)	2m 4s
test (3.2, test)	2m 2s
test (3.3, test)	2m 16s
test (head, test)	2m 3s
test (head, stdlib_test rubocop)	1m 52s
test (3.3, stdlib_test)	2m 9s
test (3.3, test, --enable-frozen-string-literal)	2m 19s
test (3.3, stdlib_test, --enable-frozen-string-literal)	2m 4s
test (3.3, lexer compile confirm_lexer)	3m 17s
test (3.3, rubocop validate test_doc build test_generate_stdlib raap)	2m 50s
test (3.3, typecheck_test)	1m 5s
	25m 57s

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