[wasm] Handle multiple python directories in emsdk #51746
Description
Sometime emsdk can contain multiple versions of python or other tools. We use $([System.IO.Directory]::GetDirectories($(_PythonToolsBasePath))) to get the _PythonToolsVersionedPath and assume there is only one subdirectory present.
src\mono\wasm\build\WasmApp.targets(289,5): error : Specified Emscripten sdk at $(EMSDK_PATH)=C:\Users\rodo\git\emsdk\ is missing some paths: $(EmscriptenPythonToolsPath)=...\emsdk\python\3.7.4-pywin32_64bit;...\emsdk\python\3.9.2-1_64bit\ . Emscripten SDK is required for AOT'ing assemblies.