FIR: add mapping to partially resolved arg list

Initially I tried adding `mapping` field to `FirArgumentList` but it
seems to be very difficult to make it flexible enough to do what I want.

So instead, I am creating a `FirPartialResolvedArgumentList`, which
seems to be very simple.

compiler/testData/diagnostics/tests/annotations/annotationParameterMustBeConstant/enumConst_after.fir.kt

@@ -11,5 +11,5 @@ enum class MyEnum {
     A
 }
 
-<!INAPPLICABLE_CANDIDATE!>@AnnE(Test())<!>
+<!INAPPLICABLE_CANDIDATE!>@AnnE(<!ANNOTATION_ARGUMENT_MUST_BE_CONST!>Test()<!>)<!>
 class Test2

compiler/testData/diagnostics/tests/annotations/annotationParameterMustBeConstant/enumConst_before.fir.kt

@@ -11,5 +11,5 @@ enum class MyEnum {
     A
 }
 
-<!INAPPLICABLE_CANDIDATE!>@AnnE(Test())<!>
+<!INAPPLICABLE_CANDIDATE!>@AnnE(<!ANNOTATION_ARGUMENT_MUST_BE_CONST!>Test()<!>)<!>
 class Test2