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[v10.x-staging] v8: fix load elimination liveness checks

Rodrigo Muino Tomonari requested to merge github/fork/bnoordhuis/fix31484-more into v10.x-staging

This commit back-ports the implementations of IsRename() and MayAlias() from the upstream 8.0 branch wholesale. Fixes several bugs where V8's load elimination pass considered values to be alive when they weren't.

Fixes: https://github.com/nodejs/node/issues/31484

Supersedes #31507.

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