Document the migration testing pipeline
What does this MR do?
Create a new doc for the migration testing pipeline.
Related to gitlab-org/database-team/team-tasks#171 (closed)
Does this MR meet the acceptance criteria?
Conformity
- [-] I have included changelog trailers, or none are needed. (Does this MR need a changelog?)
-
I have added/updated documentation, or it's not needed. (Is documentation required?) - [-] I have properly separated EE content from FOSS, or this MR is FOSS only. (Where should EE code go?)
- [-] I have added information for database reviewers in the MR description, or it's not needed. (Does this MR have database related changes?)
-
I have self-reviewed this MR per code review guidelines. - [-] This MR does not harm performance, or I have asked a reviewer to help assess the performance impact. (Merge request performance guidelines)
-
I have followed the style guides. - [-] This change is backwards compatible across updates, or this does not apply.
Availability and Testing
- [-] I have added/updated tests following the Testing Guide, or it's not needed. (Consider all test levels. See the Test Planning Process.)
- [-] I have tested this MR in all supported browsers, or it's not needed.
- [-] I have informed the Infrastructure department of a default or new setting change per definition of done, or it's not needed.
Edited by Alishan Ladhani