Added support for file-containing-symbol reflection request. #928

Job	Run time
License Header and Formatting Checks	9m 4s
Integration Tests on swiftlang/swift:nightly-jammy	4m 15s
Performance Tests on swiftlang/swift:nightly-jammy	11m 25s
Integration Tests on swift:5.9-jammy	3m 22s
Build and Test on swiftlang/swift:nightly-jammy	5m 50s
Performance Tests on swift:5.9-jammy	9m 27s
Build and Test on swift:5.9-jammy	4m 56s
Integration Tests on swift:5.8-focal	2m 53s
Performance Tests on swift:5.8-focal	9m 14s
Build and Test on swift:5.8-focal	4m 59s
Integration Tests on swift:5.7-focal	2m 47s
Performance Tests on swift:5.7-focal	9m 4s
Build and Test on swift:5.7-focal	3m 54s
	1h 21m 10s

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