Port TS#56182: Include source node inferences in string literal completions deeper in arguments #9481

Job	Run time
format	1m 27s
tidy	52s
lint (noembed)	7m 5s
extension	37s
build	4m 17s
lint (windows-latest)	11m 11s
misc	45s
test (no submodules)	8m 54s
lint (ubuntu-latest)	7m 45s
generate	12m 4s
smoke	5m 58s
test (windows-latest)	22m 6s
test (ubuntu-latest)	15m 0s
test (concurrent test programs)	14m 31s
test (race mode)	13m 59s
test (noembed)	12m 16s
required	4s
	2h 18m 51s

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