feat(keyring-controller): add withKeyringV2 and deprecate withKeyring

[ccharly]

Explanation

Another approach for withKeyringV2 where we actually extend the existing list of keyring instances to have an optional keyringV2 field.

This allow to keep them in memory and have the same lifecycle than v1 keyring instance (and since all v2 implementations are wrappers for now, they are "bound" to v1 instances anyway).

Original PR:

• feat(keyring-controller): add withKeyringV2 and deprecate withKeyring #8372

References

N/A

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​metamask/​eth-simple-keyring@​11.0.0 ⏵ 11.1.1				+8

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