FIR resolve: add partial support of extension lambda calls

Here we introduce ONLY_IMPLICIT_RECEIVER tower level
to support extension lambda calls on local variables,
and soften extension receiver checks to make such extensions visible & applicable.
Also here we try to map arguments twice for functional types

compiler/testData/diagnostics/tests/extensions/kt1875.fir.kt

@@ -3,7 +3,7 @@
 
 package kt1875
 
-fun foo(a : Int?, b : Int.(Int)->Int) = a?.<!UNRESOLVED_REFERENCE!>b<!>(1) //unnecessary safe call warning
+fun foo(a : Int?, b : Int.(Int)->Int) = a?.b(1) //unnecessary safe call warning
 
 interface T {
     val f : ((i: Int) -> Unit)?