Add RBS type signatures for TraceReporter and generate RBS file #1477

Job	Run time
steep-check (head)	17s
check-misc (head)	8s
test-memory (head)	32s
test-windows (head)	1m 41s
test-ruby (head, master)	6m 22s
test-ruby (3.0, master)	6m 10s
ruby-versions / Generate Ruby versions	2s
test-cpp (head, g++)	15s
test-cpp (head, clang++)	19s
test (2.5)	23s
test (2.6)	26s
test (2.7)	25s
test (3.0)	17s
test (3.1)	17s
test (3.2)	24s
test (3.3)	15s
test (3.4)	13s
test (head)	12s
	18m 38s

Provide feedback