add ERC7715 method on ethereum provider

[KannuSingh]

Description

Adding ERC 7715 method (wallet_issuePermissions) (wallet_grantPermissions) on ethereum-provider optional rpc methods list and type.

Type of change

• [ ] Chore (non-breaking change that addresses non-functional tasks, maintenance, or code quality improvements)
• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Draft PR (breaking/non-breaking change which needs more work for having a proper functionality [Mark this PR as ready to review only when completely ready])
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

How has this been tested?

Please describe the tests that you ran to verify your changes. Please also list any relevant details for your configuration.

Checklist

• [x] I have performed a self-review of my own code
• [ ] My changes generate no new warnings
• [ ] Any dependent changes have been merged and published in downstream modules

Additional Information (Optional)

Please include any additional information that may be useful for the reviewer.

[lukaisailovic]

Lets hold off on merging this until the EIP PR is merged