feat: allow partial revokes via wallet_revokeSession

[ffmcgee725]

Explanation

Uniswap reported a bug in slack here where MetaMask was unpermitting any EVM connections for a dapp if that dapp used the solana wallet standard provider to make a connect request and then cancelled it.

This call to disconnect() is happening outside of our packages and is not related to a previous but similar bug where our own wallet-standard provider was calling wallet_revokeSession when receiving an empty solana accountsChanged event.

To fix this, this PR proposes an implementation for partial permission revoking in the wallet_revokeSession handler so that we can then update our solana wallet-standard provider to only revoke the solana scopes when it is asked to disconnect.

References

• Fixes #728

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, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes