[wasm] simplify startup configuration

[pavelsavara]

• added Module.configSrc - to configure path to MonoConfig json file
• added Module.onConfigLoaded callback
• added Module.onDotNetReady replacing MonoConfig.loaded_cb
• removed loaded_cb, assembly_list, runtime_assets, runtime_asset_sources from MonoConfig
• simplified all sample and test projects
• renamed Module.no_global_exports to Module.disableDotNet6Compatibility
• implement default Module.preInit and Module.onRuntimeInitialized which could be overridden by user code (like Blazor)

[ghost]

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Issue Details

---

• added configSrc - path to MonoConfig json file
• added Module.onConfigLoaded callback
• added Module.onDotNetReady replacing MonoConfig.loaded_cb
• removed loaded_cb, assembly_list, runtime_assets, runtime_asset_sources from MonoConfig
• simplified all sample and test projects
• renamed Module.no_global_exports to Module.disable6Compatibility
• implement default Module.preInit and Module.onRuntimeInitialized which could be overridden by user code (like Blazor)

Author:	pavelsavara
Assignees:	-
Labels:	arch-wasm, area-System.Runtime.InteropServices.JavaScript
Milestone:	7.0.0

[lewing]

@steveisok we need a way to test changes like this in pr without directly fiddling with the yml. I think we should probably turn back on the interpreter lane until we have a way to trigger this

cc @marek-safar

[steveisok]

I don't have a problem if you want to enable the interp lane until there's an option to manually trigger everything.

Remove $(_runSmokeTestsOnlyArg) from

runtime/eng/pipelines/runtime.yml

Line 296 in ec12194

buildArgs: -s mono+libs+host+packs+libs.tests -c $(_BuildConfig) /p:ArchiveTests=true $(_runSmokeTestsOnlyArg)

as part of this PR and it'll be enabled.