Fix various Nim 2.0 issue (unary operator, global scope, $ templating)

[Clonkk]

No description provided.

[Clonkk]

Updated dollar proc.

Strange stuff happening.

One fail with
nim cpp -r tests/destroy_bug_15.nim

/Users/regis.caillaud/.cache/nim/destroy_bug_15_d/@m..@scppstl@sstd_vector.nim.cpp: In function 'tyObject_Foo__ts4nvcjAv78U4K2CTDA9a9bA* X5BX5D___destroy95bug954953_u230(TY__sufWQvCeYFKA6EJnXVsnlA*, NI)':
/Users/regis.caillaud/.cache/nim/destroy_bug_15_d/@m..@scppstl@sstd_vector.nim.cpp:311:62: error: no match for 'operator*' (operand type is 'TY__sufWQvCeYFKA6EJnXVsnlA' {aka 'std::vector<tyObject_Foo__ts4nvcjAv78U4K2CTDA9a9bA>'})
  311 |         nimln_(363);    checkIndex__destroy95bug954953_u236((*((TY__sufWQvCeYFKA6EJnXVsnlA) ((*self_p0)))), i);
      |                                                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      

The other fail with Nim error compile time as if the proic didn't exist
nim cpp -r -d:dollar1 tests/destroy_bug_15.nim

Expression: echo v
  [1] v: CppVector[destroy_bug_15.Foo]

Expected one of (first mismatch at [position]):
[1] proc echo(x: varargs[typed, `$`])

[Clonkk]

@jmgomez (sorry to ping you again) Do you have any insight into what changed in the C++ codegen that can result in this ?