[Wasm] Support WASI target in K2

- Support WASI mode in CLI and test infrastructure
- Add external declaration checker
- Split Fir diagnostic lists into Base, JS and WASI

#KT-56849 Fixed

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/frontend/fir/FirFrontendFacade.kt

@@ -29,6 +29,7 @@ import org.jetbrains.kotlin.fir.session.*
 import org.jetbrains.kotlin.fir.session.environment.AbstractProjectEnvironment
 import org.jetbrains.kotlin.js.config.JSConfigurationKeys
 import org.jetbrains.kotlin.js.config.WasmTarget
+import org.jetbrains.kotlin.js.config.wasmTarget
 import org.jetbrains.kotlin.load.kotlin.PackageAndMetadataPartProvider
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.platform.TargetPlatform
@@ -398,6 +399,7 @@ open class FirFrontendFacade(
                     sessionProvider,
                     extensionRegistrars,
                     languageVersionSettings,
+                    testServices.compilerConfigurationProvider.getCompilerConfiguration(module).wasmTarget,
                     null,
                     registerExtraComponents = ::registerExtraComponents,
                     sessionConfigurator,

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/frontend/fir/TestFirWasmSessionFactory.kt

@@ -57,7 +57,7 @@ object TestFirWasmSessionFactory {
 
     fun createModuleBasedSession(
         mainModuleData: FirModuleData, sessionProvider: FirProjectSessionProvider, extensionRegistrars: List<FirExtensionRegistrar>,
-        languageVersionSettings: LanguageVersionSettings, lookupTracker: LookupTracker?,
+        languageVersionSettings: LanguageVersionSettings, wasmTarget: WasmTarget, lookupTracker: LookupTracker?,
         registerExtraComponents: ((FirSession) -> Unit),
         sessionConfigurator: FirSessionConfigurator.() -> Unit,
     ): FirSession =
@@ -66,6 +66,7 @@ object TestFirWasmSessionFactory {
             sessionProvider,
             extensionRegistrars,
             languageVersionSettings,
+            wasmTarget,
             lookupTracker,
             icData = null,
             registerExtraComponents,