chore: update to jest 27

[cexbrayat]

Updates jest, ts-jest and babel-jest to v27.
vue-jest v5 does not support jest v27,
so a new vue3-jest package has been introduced (see vuejs/vue-jest#343),
with a version number aligned on the jest version (as ts-jest and babel-jest do).

This commits replaces vue-jest by vue3-jest, and updates the jest config to use this new trasnformer.
This will be the default Vue CLI setup in the future.

• spy on VM test is failing, blocked by fix(runtime-core): allow spying on proxy methods core#4216

[cexbrayat]

This is currently blocked by vuejs/core#4216 in vue-next, as this update surfaced an issue when spying on proxy (it in fact occurs with jest v26.6.1, but we were using an older version than that)

[cexbrayat]

jestjs/jest#11721 landed, unblocking part of the issue with proxy spying.
Jest v27.1 has been released with the fix, and this PR now uses it, allowing us to remove the dirty workaround we had to add hasOwnProperty in the future (see the second commit).

We are still waiting on vuejs/core#4216 to completely unblock this PR.

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[cexbrayat]

The proxy issue in core has been fixed and released in v3.2.31, so this PR can now be merged after review