[wasm][libs] Fix `WasmAppHost`, and `AppBundle` for library tests (#77719)

[wasm][libs] Fix `WasmAppHost`, and `AppBundle` for library tests (#77719)

* Removed fixed path separator + duplicated `browser-wasm`.

* Working fix.

* Fix for different `OutputPath` conventions.

* Fixing the url printed on the console.

* `ProcessQueryArguments` in test-main.js forces debug to be the 1st arg.

* Removing special case for WBT.

* We cannot skip checking for missing browser-wasm.

* Both runArgs and queryArgs are important when running tests.

* Revert changes in the shipped targets and move them to tests targets.

* Update src/mono/wasm/host/BrowserArguments.cs

Co-authored-by: Ankit Jain <radical@gmail.com>
* Fetch does not work for node<18 => get rid of json.

* Separated runtime args from app args for both hosts.

* Revert 7.0 file.

* Focusing on enabling libs debugging for browser.

* Should have been reverted with dae5d7460c3a23b108e1d141e72c3b0bcdc9d730.

* Fix CI lib tests: avoid referencing undefined properties.

* In all the cases runArgs should be first populated by defaults that can be later overwritten.

* Update src/mono/wasm/test-main.js

Co-authored-by: Ankit Jain <radical@gmail.com>
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Co-authored-by: Ankit Jain <radical@gmail.com>