feat(transformer): Optional Chaining #22528

Job	Run time
Build Linter Benchmark	3m 9s
Benchmark (lexer)	1m 20s
Benchmark (parser)	1m 41s
Benchmark (transformer)	2m 9s
Benchmark (isolated_declarations)	1m 48s
Benchmark (semantic)	1m 43s
Benchmark (minifier)	2m 14s
Benchmark (codegen)	6m 11s
Benchmark (sourcemap)	1m 51s
Benchmark linter (0)	2m 54s
Benchmark linter (1)	1m 33s
Upload benchmarks	29s
	27m 2s

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