[LL FIR] KT-57220 Optimize & combine synthetic function symbol providers

- Dependency symbol providers contained a lot of useless
  `FirExtensionSyntheticFunctionInterfaceProvider`s, because such a
  provider only generates function classes from compiler plugins. If
  there aren't any such `FunctionTypeKind`s in the session, there is no
  need to even add the provider.
- `FirExtensionSyntheticFunctionInterfaceProvider`s that are added to
  the list of dependency providers despite this optimization will now be
  combined in `LLFirCombinedSyntheticFunctionSymbolProvider`. It checks
  `ClassId` heuristics once, which is more efficient than checking them
  in every provider separately.

core/compiler.common/src/org/jetbrains/kotlin/builtins/functions/FunctionTypeKindExtractor.kt

@@ -10,7 +10,7 @@ import org.jetbrains.kotlin.name.FqName
 @RequiresOptIn
 annotation class AllowedToUsedOnlyInK1
 
-class FunctionTypeKindExtractor(kinds: List<FunctionTypeKind>) {
+class FunctionTypeKindExtractor(private val kinds: List<FunctionTypeKind>) {
     companion object {
         /**
          * This instance should be used only in:
@@ -49,6 +49,10 @@ class FunctionTypeKindExtractor(kinds: List<FunctionTypeKind>) {
         return packageFqName in knownKindsByPackageFqName
     }
 
+    fun getFunctionKindPackageNames(): Set<FqName> = knownKindsByPackageFqName.keys
+
+    fun hasExtensionKinds(): Boolean = kinds.any { !it.isBuiltin }
+
     data class KindWithArity(val kind: FunctionTypeKind, val arity: Int)
 
     private fun toInt(s: String): Int? {