Introduce the `--trace=actions` option #1192

Job	Run time
check-misc (head)	13s
steep-check (head)	21s
test-memory (head)	38s
test-windows (head)	2m 15s
test-ruby (head, master)	5m 43s
test-ruby (3.0, master)	5m 35s
ruby-versions / Generate Ruby versions	4s
test (2.5)	27s
test (2.6)	24s
test (2.7)	22s
test (3.0)	11s
test (3.1)	17s
test (3.2)	15s
test (3.3)	12s
test (head)	15s
	17m 12s

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