[cDAC] implement IXCLRDataMethodInstance::GetName and associated APIs

[max-charlamb]

Implements:

• IXCLRDataStackWalk::GetFrame
• IXCLRDataFrame::GetMethodInstance
• IXCLRDataMethodInstance::GetName

The former two are required to verify GetName as SOS uses IXCLRDataStackWalk::GetFrame -> IXCLRDataFrame::GetMethodInstance to get the instantiation of IXCLRDataMethodInstance it calls GetName` on.

Modifies:

• IDacStreams_1.StringFromEEAddress to not throw on read failure. Previously we wrapped this API in a try/catch, given it can return a null value, I believe it is acceptable to return null on read failures.

[Copilot]

Pull Request Overview

This PR implements the IXCLRDataMethodInstance::GetName method in the cDAC (contract-based Data Access Component) implementation, replacing a previously unimplemented stub that delegated to the legacy implementation.

Key changes:

• Implements method name generation using TypeNameBuilder.AppendMethodInternal with fallback mechanisms
• Adds error handling and debug validation against the legacy implementation
• Improves robustness of string retrieval from EE addresses

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
ClrDataMethodInstance.cs	Implements GetName method with proper name formatting, fallback logic, and debug validation
SOSDacImpl.cs	Removes nested try-catch block in GetMethodTableName method
DacStreams_1.cs	Adds exception handling for VirtualReadException in StringFromEEAddress method

[rcj1]

LGTM otherwise