[wasm][sdk] Decoupling the WebAssembly runtime debug and release versions. (#16028)
* Update templates
- Add PropertyGroups for Debug and Release to set the DebugSymbols and DebugType by default.
* Allow the selection of the WebAssembly runtime version Debug | Release
- Decouple the reliance on `_DebugSymbolsProduced` to decide which runtime version to publish.
- Add support for <MonoWasmRuntime>Debug | Release</MonoWasmRuntime>
- Add validation target of the property to Mono.WebAssembly.Build.targets.
* Indentation