Refactor Vault resources

What's Changed

• Add coverage by @Arussil in #204
• Passing gitlab_url to terraform by @Arussil in #205
• Hotfix monitoring by @daniele20tab in #207
• Add postgis support by @trottomv in #206
• Support GitLab subgroup by @daniele20tab in #208
• Fix cookiecutter Pact and Vault flags by @filippo-20tab in #209
• Refactor Vault resources by @filippo-20tab in #210

New Contributors

• @Arussil made their first contribution in #204

Full Changelog: 1.2.1...1.3.0