Unusual assignment diagnostic when trying to call `ADR` on qualified action reference

[mhasel]

Describe the bug While testing edge cases for #1165 i came across an unsual assignment diagnostic. Trying to get the address of a qualified action reference ADR(FOO.BAR) validates an assignment of BAR to FOO.

To Reproduce

PROGRAM prog
  VAR
    fb : FOO;
    address: LWORD;
  END_VAR
     address := ADR(fb.BAR);
END_PROGRAM

FUNCTION_BLOCK FOO
END_FUNCTION_BLOCK

ACTIONS 
  ACTION BAR
  END_ACTION
END_ACTIONS

This will result in

error[E037]: Invalid assignment: cannot assign 'BAR' to 'FOO'
  ┌─ target/demo.st:6:21
  │
6 │      address := ADR(fb.BAR);
  │                     ^^^^^^^ Invalid assignment: cannot assign 'BAR' to 'FOO'

Expected behavior Being able to get the address of the instanced action without diagnostics.