JVM_IR: omit bound receiver in IrExpressionLambdaImpl parameters

and remove a hack intended to replace the missing type conversions this
caused.

 #KT-46505 Fixed

compiler/testData/codegen/box/inlineClasses/callableReferences/let/null.kt

@@ -0,0 +1,5 @@
+inline class Value(val value: Any)
+
+fun foo(value: Value?) = value?.value as String?
+
+fun box(): String = (null as Value?).let(::foo) ?: "OK"