fix: unwrap method call validator errors and add tests

[shanejonas]

Explanation

This removes the jsonrpc error wrapping that happens in the method call validator. Also adds a new error returned for when the parameter length is mismatched.

References

fixes this TODO item: https://github.com/MetaMask/core/pull/4784#discussion_r1801862444

Changelog

@metamask/package-a

• <CATEGORY>: Your change here
• <CATEGORY>: Your change here

@metamask/package-b

• <CATEGORY>: Your change here
• <CATEGORY>: Your change here

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 highlighted breaking changes using the "BREAKING" category above as appropriate
• [ ] I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes