Identifiers.doi_pattern setting is flagged as translatable

[mauromsl]

Describe the bug
The setting doi_pattern is flagged as ìs_translatable=true which seems incorrect. This leads to a number of problems on journals that had I18N enabled at some point, since they now might not have a setting value set for their default language (e.g if the language context of the journal manager was not set to the default language at the time when the setting was first entered)

As a result, those journals now raise an error whenever the setting is fetched in the default language context (or any other language even)

Janeway version
v1.3.9

Expected behavior
The setting should be flagged as not translatable at installation time.
A migration is required to fix current installs where:

• A value is set for the default language
• The installed setting is_translatable attribute has to change to false