Make it possible to override awk --lint option (#4114)

Currently, it's not possible to override the awk `--lint` option with

```viml
let g:ale_awk_gawk_options = '--lint=no-ext'
```

although this could be useful for those who only use gawk and don't want to get these lint errors:
> FEATURE X is a gawk extension

The idea is to move the default `--lint` option before the `awk_gawk_options` in the gawk.vim code to give the custom `--lint=...` option a higher precedence.

Co-authored-by: Barnabás Ágoston <barna@agoston.dev>

ale_linters/awk/gawk.vim

@@ -9,8 +9,9 @@ function! ale_linters#awk#gawk#GetCommand(buffer) abort
     " gawk from attempting to execute the body of the script
     " it is linting.
     return '%e --source ' . ale#Escape('BEGIN { exit } END { exit 1 }')
+    \   . ' --lint'
     \   .  ale#Pad(ale#Var(a:buffer, 'awk_gawk_options'))
-    \   . ' -f %t --lint /dev/null'
+    \   . ' -f %t /dev/null'
 endfunction
 
 call ale#linter#Define('awk', {