feat(tasks/coverage): estree test262 conformance runner

[hi-ogawa]

Related #8630

I updated Boshen's branch https://github.com/oxc-project/oxc/compare/estree. Instead of creating a 2nd serializer to strip ts ast suggested by overlookmotel, for now I'm stripping extra properties on oxc side before comparing acorn output, which allows easier diff and usable coverage report at this current state.

[graphite-app]

How to use the Graphite Merge Queue

Add either label to this PR to merge it via the merge queue:

• 0-merge - adds this PR to the back of the merge queue
• hotfix - for urgent hot fixes, skip the queue and merge this PR next

You must have a Graphite account in order to use the merge queue. Sign up using this link.

An organization admin has enabled the Graphite Merge Queue in this repository.

Please do not merge from GitHub as this will restart CI on PRs being processed by the merge queue.

[overlookmotel]

Removing fields from Oxc AST which don't exist in Acorn AST is not 100% accurate - we may be including spurious fields which aren't related to TS, and we won't catch them this way. But it's a very good place to start!

Thank you.

[overlookmotel]

I just tried it out. Wow it's really slow. Damn you serde!

A custom serializer which removes the TS-related fields will speed it up, but in meantime it's great to have this working, so we can make progress.

I've made some changes to acorn-test262 today, and am updating to latest commits (#8958).