IR: cleanup expression implementations

Remove unused constructors with descriptors, minimize usages of
secondary constructors and make some properties non-lateinit, fix some
inspections.

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrVisitor.kt

@@ -847,9 +847,7 @@ class Fir2IrVisitor(
     override fun visitCatch(catch: FirCatch, data: Any?): IrElement {
         return catch.convertWithOffsets { startOffset, endOffset ->
             val catchParameter = declarationStorage.createIrVariable(catch.parameter, conversionScope.parentFromStack())
-            IrCatchImpl(startOffset, endOffset, catchParameter).apply {
-                result = catch.block.convertToIrExpressionOrBlock()
-            }
+            IrCatchImpl(startOffset, endOffset, catchParameter, catch.block.convertToIrExpressionOrBlock())
         }
     }
 

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/generators/CallAndReferenceGenerator.kt

@@ -273,9 +273,9 @@ class CallAndReferenceGenerator(
         val fir = calleeReference.resolvedSymbol.fir
         if (this is FirFunctionCall && fir is FirSimpleFunction && fir.origin == FirDeclarationOrigin.SamConstructor) {
             return convertWithOffsets { startOffset, endOffset ->
-                IrTypeOperatorCallImpl(startOffset, endOffset, type, IrTypeOperator.SAM_CONVERSION, type).apply {
-                    argument = visitor.convertToIrExpression(this@tryConvertToSamConstructorCall.argument)
-                }
+                IrTypeOperatorCallImpl(
+                    startOffset, endOffset, type, IrTypeOperator.SAM_CONVERSION, type, visitor.convertToIrExpression(argument)
+                )
             }
         }
         return null