fix: addDebugInfo before convertExpression #4731

Job	Run time
Check	4s
Bootstrap (debug)	6m 13s
Compiler (ubuntu, node current)	2m 3s
Bootstrap (release)	6m 48s
Coverage	3m 45s
Compiler (ubuntu, node lts/*)	2m 1s
Features	21s
Compiler (macos, node current)	2m 25s
Loader	20s
Compiler (macos, node lts/*)	2m 42s
Runtimes	32s
Compiler (windows, node current)	2m 27s
Compiler (windows, node lts/*)	2m 45s
	32m 26s

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