Now we don't send sourceReference if we can't retrieve the source

[digeff]

Before this change we were sending sourceReference for sources we couldn't find the source for. This PR addresses that issue. As an experiment, we implemented this change by inserting a function instead of a class like we normally do. We added some support to be able to do that.

• src/chrome/cdtpDebuggee/cdtpDIContainer.ts:

  • Exported getSourceTextRetrievability so it can be customized by chrome-debug

• src/chrome/client/sourceToClientConverter.ts:

  • Only include sourceReferences for sources we can actually get the source for...

• src/chrome/dependencyInjection.ts/bind.ts:

  • Don't modify injectables that are numbers

• src/chrome/dependencyInjection.ts/di.ts:

  • Add support for injecting functions instead of classes
  • Pass _componentCustomizationCallback to find places where we should've been passing it already

• src/chrome/dependencyInjection.ts/types.ts:

  • Add isValueComponent to identify if an identifier is a class or a value

• src/chrome/internal/sources/sourceTextRetriever.ts:

  • Refactor the text logic to create the getSourceTextRetrievability functions

• src/chrome/logging/methodsCalledLogger.ts:

  • Don't try to wrap numbers in a proxy

This change won't compile with a required change in chrome-debug: https://github.com/microsoft/vscode-chrome-debug/pull/930

[roblourens]

Integration test failure?