feat(web): exposed a job to manually trigger database backup procedures (#16622)

* feat(web): exposed a new job to create a manual database backup

* chore(server): added a new test case

* chore(server): moved job to backup db into the create job popup

* remove irrelevant change

* openapi

* chore: formatting

* docs: trigger backup documentation

---------

Co-authored-by: Lorenzo Montanari <13736036+l0ll098@users.noreply.github.com>
Co-authored-by: Alex Tran <alex.tran1502@gmail.com>
Co-authored-by: Zack Pollard <zack@futo.org>

open-api/immich-openapi-specs.json

@@ -9918,7 +9918,8 @@
           "tag-cleanup",
           "user-cleanup",
           "memory-cleanup",
-          "memory-create"
+          "memory-create",
+          "backup-database"
         ],
         "type": "string"
       },