KTIJ-30709 [LL FIR] Enable missing `syntheticFunctionInterfaceProvider` in `LLFirCommonSessionFactory`

Now, synthetic functional types (like `ComposableFunctionN`)
are properly resolved in common modules

`syntheticFunctionInterfaceProvider` is already enabled in JVM, JS,
and Native platform session factories

Also, improve KDoc for `FirExtensionSyntheticFunctionInterfaceProvider`

^KTIJ-30709 Fixed
diff --git a/analysis/analysis-api/testData/symbols/symbolByReference/withTestCompilerPluginEnabled/composableFunctionInCommonModule.pretty.txt b/analysis/analysis-api/testData/symbols/symbolByReference/withTestCompilerPluginEnabled/composableFunctionInCommonModule.pretty.txt
index 9b61656..66a099b 100644
--- a/analysis/analysis-api/testData/symbols/symbolByReference/withTestCompilerPluginEnabled/composableFunctionInCommonModule.pretty.txt
+++ b/analysis/analysis-api/testData/symbols/symbolByReference/withTestCompilerPluginEnabled/composableFunctionInCommonModule.pretty.txt
@@ -1,2 +1,2 @@
 @org.jetbrains.kotlin.fir.plugin.MyComposable
-fun Foo(text: ERROR_TYPE(Symbol not found for some/MyComposableFunction0))
\ No newline at end of file
+fun Foo(text: @org.jetbrains.kotlin.fir.plugin.MyComposable (() -> kotlin.Unit))
\ No newline at end of file
diff --git a/analysis/analysis-api/testData/symbols/symbolByReference/withTestCompilerPluginEnabled/composableFunctionInCommonModule.txt b/analysis/analysis-api/testData/symbols/symbolByReference/withTestCompilerPluginEnabled/composableFunctionInCommonModule.txt
index 39e766be..b4ef2a9 100644
--- a/analysis/analysis-api/testData/symbols/symbolByReference/withTestCompilerPluginEnabled/composableFunctionInCommonModule.txt
+++ b/analysis/analysis-api/testData/symbols/symbolByReference/withTestCompilerPluginEnabled/composableFunctionInCommonModule.txt
@@ -51,12 +51,18 @@
       name: text
       origin: SOURCE
       receiverParameter: null
-      returnType: KaClassErrorType:
+      returnType: KaFunctionType:
         annotations: [
           org/jetbrains/kotlin/fir/plugin/MyComposable()
             psi: KtAnnotationEntry
         ]
-        type: ERROR_TYPE
+        typeArguments: [
+          KaUsualClassType:
+            annotations: []
+            typeArguments: []
+            type: kotlin/Unit
+        ]
+        type: @R|org/jetbrains/kotlin/fir/plugin/MyComposable|()  some/MyComposableFunction0<kotlin/Unit>
       visibility: PUBLIC
       getContainingFileSymbol: KaFileSymbol(Common.kt)
       getContainingJvmClassName: test.CommonKt
diff --git a/analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/sessions/LLFirCommonSessionFactory.kt b/analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/sessions/LLFirCommonSessionFactory.kt
index 6dbd59f..81fbe5b 100644
--- a/analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/sessions/LLFirCommonSessionFactory.kt
+++ b/analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/sessions/LLFirCommonSessionFactory.kt
@@ -37,6 +37,7 @@
                     providers = listOfNotNull(
                         context.firProvider.symbolProvider,
                         context.switchableExtensionDeclarationsSymbolProvider,
+                        context.syntheticFunctionInterfaceProvider,
                     ),
                     context.dependencyProvider,
                 )
diff --git a/compiler/fir/providers/src/org/jetbrains/kotlin/fir/resolve/providers/impl/FirExtensionSyntheticFunctionInterfaceProvider.kt b/compiler/fir/providers/src/org/jetbrains/kotlin/fir/resolve/providers/impl/FirExtensionSyntheticFunctionInterfaceProvider.kt
index 4741758..2bd0ea8 100644
--- a/compiler/fir/providers/src/org/jetbrains/kotlin/fir/resolve/providers/impl/FirExtensionSyntheticFunctionInterfaceProvider.kt
+++ b/compiler/fir/providers/src/org/jetbrains/kotlin/fir/resolve/providers/impl/FirExtensionSyntheticFunctionInterfaceProvider.kt
@@ -41,8 +41,10 @@
 import org.jetbrains.kotlin.types.Variance
 import org.jetbrains.kotlin.util.OperatorNameConventions
 
-/*
+/**
  * Provides function interfaces for function kinds from compiler plugins
+ *
+ * @see org.jetbrains.kotlin.fir.extensions.FirFunctionTypeKindExtension
  */
 class FirExtensionSyntheticFunctionInterfaceProvider(
     session: FirSession,