CloudMigrations: Implement migrations API (#85348)

* Implement run migration endpoint

* Refactor RunMigration method into separate methods

* Save migration runs fix lint

* Minor changes

* Refactor how to use cms endpoint

* fix interface

* complete merge

* add individual items

* adds tracing to getMigration

* linter

* updated swagger definition with the latest changes

* CloudMigrations: Implement core API handlers for cloud migrations and migration runs (#85407)

* implement delete

* add auth token encryption

* implement token validation

* call token validation during migration creation

* implement get migration status

* implement list migration runs

* fix bug

* finish parse domain func

* fix urls

* fix typo

* fix encoding and decoding

* remove double decryption

* add missing slash

* fix id returned by create function

* inject missing services

* finish implementing (as far as I can tell right now) data migration and response handling

* comment out broken test, needs a rewrite

* add a few final touches

* get dashboard migration to work properly

* changed runMigration to a POST

* swagger

* swagger

* swagger

---------

Co-authored-by: Michael Mandrus <michael.mandrus@grafana.com>
Co-authored-by: Leonard Gram <leo@xlson.com>
Co-authored-by: Michael Mandrus <41969079+mmandrus@users.noreply.github.com>

conf/defaults.ini

@@ -1832,4 +1832,6 @@ create_access_policy_timeout = 5s
 # How long to wait for a request to create to fetch an access policy to complete
 fetch_access_policy_timeout = 5s
 # How long to wait for a request to create to delete an access policy to complete
-delete_access_policy_timeout = 5s
+delete_access_policy_timeout = 5s
+# The domain name used to access cms
+domain = grafana-dev.net