fix: signTypedData eip712domain

[ieow]

Motivation and Context

Jira Link:

Description

sync signTypedData handler between ethereum-mpc-provider and ethereum-provider
39dddf7

question
should the developer should make sure the eip712domain is not added to the types or the wallet should remove it from the types?
currently ethers lib's TypedDataEncoder.getPayload(domain, types, value) is generating the payload with eip712domain type in the types

How has this been tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project. (run lint)
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My code requires a db migration.

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[ieow]

@himanshuchawla009 , @chaitanyapotti

do we want to delete the Domain type in the 'types' field?
or should we skip check unused Domain type ?

Both ethers and viem are appending the Domain type to the types field

[himanshuchawla009]

lgtm