[wasm] Do not set -msimd128 in the default rsp

[radekdoulik]

This is the first part of changes to make wasm/SIMD optional again, #89302

The WASM_OPT_ADDITIONAL_FLAGS is not used anymore, so remove it.

Force relink when disabling SIMD or EH.

[radekdoulik]

counts of the SIMD instructions in the bench sample (aot) to check the changes. the remaining instructions come from mono runtime libs and will be handled in separate PR

> wa-info -d src/mono/sample/wasm/browser-bench/bin-head-nosimd/Release/AppBundle/_framework/dotnet.native.wasm|grep SIMD|wc -l
    6025
> wa-info -d src/mono/sample/wasm/browser-bench/bin-head-simd/Release/AppBundle/_framework/dotnet.native.wasm|grep SIMD|wc -l 
   13060
> wa-info -d src/mono/sample/wasm/browser-bench/bin-PR-nosimd/Release/AppBundle/_framework/dotnet.native.wasm|grep SIMD|wc -l 
    1408
> wa-info -d src/mono/sample/wasm/browser-bench/bin-PR-simd/Release/AppBundle/_framework/dotnet.native.wasm|grep SIMD|wc -l 
   13060

[pavelsavara]

Please also make it to trigger WasmBuildNative similar to

<WasmBuildNative Condition="'$(WasmBuildNative)' == '' and '$(WasmEnableLegacyJsInterop)' == 'false'" >true</WasmBuildNative>

Also please do it for WasmEnableExceptionHandling