[Translation] [Loader] Add INI_SCANNER_RAW to parse ini files

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | yes
| Deprecations? | no
| Tests pass?   | no
| Fixed tickets | 
| License       | MIT
| Doc PR        | 

INI_SCANNER_RAW change the default scanner mode of parse_ini_files to parse all values without evaluate. This allow values with single quotes, "no" and "false" and raise an error if you use the deprecated "#" as comment character.
This change is specially good for shared translations, because a translator haven't to know that he can't use a few restricted terms.
And has a residual improvement: it's twice fast that use the default value (INI_SCANNER_NORMAL) in my tests