[FIR2IR] Simplify generation of bound callable reference receivers

Remove a bunch of custom logic to determine when a callable reference is
bound or not (and hence mustn't have a receiver). Instead, a helper
extension is introduced to determine when a callable reference is bound
by checking if dispatch/extensionReceiver is not FirNoReceiver and the
referenced member is not static.

#KT-57253 Fixed

compiler/fir/tree/src/org/jetbrains/kotlin/fir/expressions/FirExpressionUtil.kt

@@ -9,6 +9,7 @@ import org.jetbrains.kotlin.KtSourceElement
 import org.jetbrains.kotlin.fir.FirElement
 import org.jetbrains.kotlin.fir.declarations.FirDeclarationOrigin
 import org.jetbrains.kotlin.fir.declarations.FirValueParameter
+import org.jetbrains.kotlin.fir.declarations.utils.isStatic
 import org.jetbrains.kotlin.fir.diagnostics.ConeDiagnostic
 import org.jetbrains.kotlin.fir.expressions.builder.buildConstExpression
 import org.jetbrains.kotlin.fir.expressions.builder.buildErrorExpression
@@ -17,10 +18,7 @@ import org.jetbrains.kotlin.fir.expressions.impl.FirBlockImpl
 import org.jetbrains.kotlin.fir.expressions.impl.FirNoReceiverExpression
 import org.jetbrains.kotlin.fir.expressions.impl.FirResolvedArgumentList
 import org.jetbrains.kotlin.fir.expressions.impl.FirSingleExpressionBlock
-import org.jetbrains.kotlin.fir.references.FirReference
-import org.jetbrains.kotlin.fir.references.FirResolvedNamedReference
-import org.jetbrains.kotlin.fir.references.resolved
-import org.jetbrains.kotlin.fir.references.toResolvedFunctionSymbol
+import org.jetbrains.kotlin.fir.references.*
 import org.jetbrains.kotlin.fir.symbols.impl.FirCallableSymbol
 import org.jetbrains.kotlin.fir.types.ConeClassLikeType
 import org.jetbrains.kotlin.fir.types.FirResolvedTypeRef
@@ -162,3 +160,12 @@ fun FirExpression.unwrapSmartcastExpression(): FirExpression =
         is FirSmartCastExpression -> originalExpression
         else -> this
     }
+
+/**
+ * A callable reference is bound iff
+ * - one of [dispatchReceiver] or [extensionReceiver] is **not** [FirNoReceiverExpression] and
+ * - it's not referring to a static member.
+ */
+val FirCallableReferenceAccess.isBound: Boolean
+    get() = (dispatchReceiver != FirNoReceiverExpression || extensionReceiver != FirNoReceiverExpression) &&
+            calleeReference.toResolvedCallableSymbol()?.isStatic != true