Backup update (#10586)

* Update django-dbbackup version

* Specify STORAGES option for dbbackup

* Add more backup configuration

* Support custom date formats

* Add connector options

* Extend functionality of invoke backup

* Add extra options for restore task

* Add invoke task for finding additional backups

* Small tweaks

* Add docs around backup / restore

* Fix typo

* Add example for GCS storage

* More docs

docs/main.py

@@ -233,12 +233,12 @@ def define_env(env):
         return url
 
     @env.macro
-    def invoke_commands():
+    def invoke_commands(command: str = '--list'):
         """Provides an output of the available commands."""
         tasks = here.parent.joinpath('tasks.py')
         output = gen_base.joinpath('invoke-commands.txt')
 
-        command = f'invoke -f {tasks} --list > {output}'
+        command = f'invoke -f {tasks} {command} > {output}'
 
         assert subprocess.call(command, shell=True) == 0