Natively support musl-based environments

[cretz]

Describe the solution you'd like

• For any core-based SDKs, publish musl-based libraries and have musl-based CI
  • Can wait until first SDK has it to see how CI setup is done best in GitHub
• For the time-skipping test server, build a musl-based binary
• For temporal.download, accept musl=true URL argument to only return musl-specific time-skipping test server
• For Core, make sure to populate musl=true in the URL to temporal.download if compiled in musl triple

Per-SDK Tickets

• Go - N/A
• Java - Support musl-based build of test server sdk-java#2402
• Core - [Feature Request] Add musl=true to end of temporal.download ephemeral download URLs as needed sdk-core#872
• TypeScript - [Feature Request] Include musl-based shared library in package sdk-typescript#1621
• Python - [Feature Request] Publish musl wheel sdk-python#761
• .NET - [Feature Request] Include musl-based build in NuGet package sdk-dotnet#408
• Ruby - [Feature Request] Build musl gem sdk-ruby#215
• PHP - N/A
• Temporal CLI - N/A