Fix structure.sql file

The strcture.sql file is out of sync for the following indexes:

- index_environments_on_auto_stop_at
- index_merge_request_context_commits_on_merge_request_id

We had to add the migrations back to remove those indexes.

Changelog: fixed

Relates to https://gitlab.com/gitlab-org/gitlab/-/merge_requests/77754

db/post_migrate/20220111093534_remove_index_on_auto_stop_in.rb

+# frozen_string_literal: true
+
+class RemoveIndexOnAutoStopIn < Gitlab::Database::Migration[1.0]
+  TABLE = :environments
+  INDEX_NAME = 'index_environments_on_auto_stop_at'
+  COLUMN = :auto_stop_at
+
+  disable_ddl_transaction!
+
+  def up
+    remove_concurrent_index TABLE, COLUMN, where: 'auto_stop_at IS NOT NULL', name: INDEX_NAME
+  end
+
+  def down
+    add_concurrent_index TABLE, COLUMN, where: 'auto_stop_at IS NOT NULL', name: INDEX_NAME
+  end
+end

db/post_migrate/20220111101421_remove_index_on_merge_request_id.rb

+# frozen_string_literal: true
+
+class RemoveIndexOnMergeRequestId < Gitlab::Database::Migration[1.0]
+  TABLE = :merge_request_context_commits
+  INDEX_NAME = 'index_merge_request_context_commits_on_merge_request_id'
+  COLUMN = :merge_request_id
+
+  disable_ddl_transaction!
+
+  def up
+    remove_concurrent_index TABLE, COLUMN, name: INDEX_NAME
+  end
+
+  def down
+    add_concurrent_index TABLE, COLUMN, name: INDEX_NAME
+  end
+end

db/schema_migrations/20220111093534

+ff0127967c3ee6e4f4af528b84024a6a838f8dbeb19cf78d7d913d4fc8e155e7
\ No newline at end of file

db/schema_migrations/20220111101421

+abbba4ccacebb825c3f9cb5b0463d457fd4a7b4396a2184a995e496aebaf4521
\ No newline at end of file

db/structure.sql

@@ -26079,8 +26079,6 @@ CREATE INDEX index_emails_on_user_id ON emails USING btree (user_id);
 
 CREATE INDEX index_enabled_clusters_on_id ON clusters USING btree (id) WHERE (enabled = true);
 
-CREATE INDEX index_environments_on_auto_stop_at ON environments USING btree (auto_stop_at) WHERE (auto_stop_at IS NOT NULL);
-
 CREATE INDEX index_environments_on_name_varchar_pattern_ops ON environments USING btree (name varchar_pattern_ops);
 
 CREATE UNIQUE INDEX index_environments_on_project_id_and_name ON environments USING btree (project_id, name);