Some `PropertyAccess`es are parsed as `PrefixedIdentifier`s

[FMorschel]

void foo(int value) {
  value.isEven;
}

Here is the resolved AST:

CompilationUnitImpl [void foo(int value) {value.isEven;}] 
  FunctionDeclarationImpl [void foo(int value) {value.isEven;}] 
    NamedTypeImpl [void] 
    FunctionExpressionImpl [(int value) {value.isEven;}] 
      FormalParameterListImpl [(int value)] 
        SimpleFormalParameterImpl [int value] 
          NamedTypeImpl [int] 
      BlockFunctionBodyImpl [{value.isEven;}] 
        BlockImpl [{value.isEven;}] 
          ExpressionStatementImpl [value.isEven;] 
            PrefixedIdentifierImpl [value.isEven] 
              SimpleIdentifierImpl [value] 
              SimpleIdentifierImpl [isEven] 

I'm not sure if this can be fixed or if this can cause any bugs, but I'm opening this JIC we want to fix it.

Somewhat related to https://github.com/dart-lang/sdk/issues/49434 as a request for reviewing some related AST.

I've talked about this a while ago with @bwilkerson, but I never opened an issue.

FYI @DanTup, @srawlins

CC @scheglov