[v8.x backport] build: allow enabling the --trace-maps flag in V8 #14344
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Backport of #14018 to v8.x
This can be useful for tracing map creation.
PR-URL: #14018
Reviewed-By: Ben Noordhuis info@bnoordhuis.nl
Reviewed-By: Colin Ihrig cjihrig@gmail.com
Reviewed-By: Anna Henningsen anna@addaleax.net
Reviewed-By: Refael Ackermann refack@gmail.com
Checklist
make -j4 test
(UNIX), orvcbuild test
(Windows) passesAffected core subsystem(s)