fix(identifier): add `ZWSP` to `is_irregular_whitespace` #20281

Job	Run time
Benchmark (lexer)	1m 26s
Build Linter Benchmark	2m 50s
Benchmark (parser)	1m 57s
Benchmark (transformer)	2m 0s
Benchmark (isolated_declarations)	1m 50s
Benchmark (semantic)	1m 47s
Benchmark (minifier)	2m 33s
Benchmark (codegen)	1m 36s
Benchmark (sourcemap)	1m 41s
Benchmark linter (0)	3m 9s
Benchmark linter (1)	2m 1s
Upload benchmarks	26s
	23m 16s

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