* Draft to implement support to symbolOptions from dap.

* removing debugger.launch

* Adding tests and fix compilation error

* Adding test case.

* Fix test cases, and implement support to PDBChecksum used on nuget.org to get symbols.

* merge

* Fixing tests.

* Tests are timing out.

* Apply suggestions from code review
Co-authored-by: NLarry Ewing <lewing@microsoft.com>
Co-authored-by: NAnkit Jain <radical@gmail.com>

* adressing @radical comments.

* Addressing @radical comment.

* Addressing @radical comments.

* Apply suggestions from code review
Co-authored-by: NAnkit Jain <radical@gmail.com>

* Addressing @radical comments.

* Addressing @radical comments
Changing when the symbols from symbol server is loaded because it takes a long time to load, as there are a lot of assemblies loaded not found on symbol servers.

* use MicrosoftCodeAnalysisCSharpVersion for scripting package.

* Adding more tests as asked by @radical
Removing timeout change as @radical has split it into 2 files
Fixing test behavior, when justMyCode is disabled but the symbols are not loaded from symbol server.

* [wasm] some cleanup

- Don't call `UpdateSymbolStore` from `DebugStore..ctor` because that
gets called multiple times in `LoadStore`, but only once instance gets
used.
- Use an isolated symbol cache path per test

* remove debug spew

* Addressing radical comment.
Co-authored-by: NLarry Ewing <lewing@microsoft.com>
Co-authored-by: NAnkit Jain <radical@gmail.com>