[wasm][debugger] Improving logging control for tests (#42175)

[wasm][debugger] Improving logging control for tests (#42175)

- replace CWLs with log messages
- Fix use of loggerFactory, and logger to correctly configure them, and
allow being controlled via appsettings.json

- Also, add default settings for proxy also, just an example:

```
     "LogLevel": {
       "Default": "Error",
       "Microsoft": "Warning",
       "Microsoft.WebAssembly.Diagnostics.TestHarnessProxy": "Information",
       "Microsoft.WebAssembly.Diagnostics.DevToolsProxy": "Information",
       "DebuggerTests.Inspector": "Information"
    }
```

Eg. to see trace messages (eg. protocol chat) for the test proxy:
    `"Microsoft.WebAssembly.Diagnostics.TestHarnessProxy": "Trace"`