Built-in query responses should use "RawValue"

[cretz]

Describe the solution you'd like

After #603 is done for an SDK, for all built-in queries the SDK needs to return "RawValue"s from default converters instead of structures because the latter expects a certain form of converter the user may not have configured.

Per-SDK Tickets

• Go - Built-in query responses should use "RawValue" sdk-go#1843
• Java - Built-in query responses should use "RawValue" sdk-java#2426
• Core - N/A
• TypeScript - [Feature Request] Built-in query responses should use "RawValue" sdk-typescript#1630
• Python - [Feature Request] Built-in query responses should use "RawValue" sdk-python#773
• .NET - [Feature Request] Built-in query responses should use "RawValue" sdk-dotnet#414
• Ruby - [Feature Request] Built-in query responses should use "RawValue" sdk-ruby#224
• PHP - [Feature Request] Built-in query responses should use "RawValue" sdk-php#575
• Temporal CLI - N/A

[THardy98]

Note, as mentioned here, this is a backwards incompatible change and should be limited to the built-in metadata query only. Existing usage of the metadata query will need to explicitly convert the payload returned in RawValue to temporal.api.sdk.v1.IWorkflowMetadata