Squash db migration that have already been released (7.x.x) (#7764)

* Redump create_tables.sql with migrations through timestamp 2022050916074300

* Redump create_tables.sql with migrations through timestamp 2022050916074300

* Remove migrations that existed at RELEASE-7.0.1

* updated files for DB migration

* removed changes specific to mac

* added changelog entry

* formatting

* formatting-1

* update create_tables file

* missing semicolon

* copy-paste table error

* adding a unique constraint for cdn lock

* addressed review comments.

* addressed review comments-1.

* addressed review comments-2.

* fixed roles

* spelling correction

* Removed extra added fields by migration script and reordered statuses in seeds.sql

* added owner back for server

* added sed lines back

* updated first migration timestamp for failing tests

CHANGELOG.md

@@ -82,6 +82,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - [#7766](https://github.com/apache/trafficcontrol/pull/7766) *Traffic Portal* now uses TO APIv5
 
 ### Fixed
+- [#7764](https://github.com/apache/trafficcontrol/pull/7764) *Traffic Ops* Collapsed DB migrations
 - [#7767](https://github.com/apache/trafficcontrol/pull/7767) *Traffic Ops* Fixed ASN update logic for APIv5
 - [RFC3339](https://github.com/apache/trafficcontrol/issues/5911)
     - [#7759](https://github.com/apache/trafficcontrol/pull/7759) *Traffic Ops* Fixed `/profiles/{{ID}}/parameters` and `profiles/name/{{name}}/parameters` v5 APIs to respond with `RFC3339` timestamps.

traffic_ops/app/db/SQUASH.md

@@ -19,7 +19,7 @@ under the License.
 
 # Squashing database migrations
 
-For convenience, [`squash_migrations.sh`](https://github.com/apache/trafficcontrol/blob/master/traffic_ops/app/db/squash_migrations.sh) script squashes the migrations, but whoever PRs the result is responsible for verifying that the migrations are squashed and `LastSquashedMigrationVersion` in [`db/admin.go`](https://github.com/apache/trafficcontrol/blob/master/traffic_ops/app/db/admin.go) is updated correctly, regardless of the result of having run the script.
+For convenience, [`squash_migrations.sh`](https://github.com/apache/trafficcontrol/blob/master/traffic_ops/app/db/squash_migrations.sh) script squashes the migrations, but whoever PRs the result is responsible for verifying that the migrations are squashed, regardless of the result of having run the script.
 
 --------
 
@@ -43,8 +43,7 @@ And suppose the ATC [`master`](https://github.com/apache/trafficcontrol/commits/
 
 1. In order to prepare database migrations for the next major release, in this case, ATC 148.0.0, migrations `1` and `3` should be collapsed into `create_tables.sql` and migrations `4` and `9` should remain in [`traffic_ops/app/db/migrations/`](https://github.com/apache/trafficcontrol/tree/master/traffic_ops/app/db/migrations/).
 
-2. * Note that `3` is the migration timestamp of the last up/down migration set. Find the definition for `LastSquashedMigrationTimestamp` in [`traffic_ops/app/db/admin.go`](https://github.com/apache/trafficcontrol/blob/master/traffic_ops/app/db/admin.go) and change it to `3`.
-   * After migrations from ATC 147.5.8 have been collapsed, the first migration version will be `4`. Find the definition for `FirstMigrationTimestamp` in [`traffic_ops/app/db/admin.go`](https://github.com/apache/trafficcontrol/blob/master/traffic_ops/app/db/admin.go) and change it to `4`.
+2. * After migrations from ATC 147.5.8 have been collapsed, the first migration version will be `4`. Find the definition for `FirstMigrationTimestamp` in [`traffic_ops/app/db/admin.go`](https://github.com/apache/trafficcontrol/blob/master/traffic_ops/app/db/admin.go) and change it to `4`.
 
 Past PRs that have collapsed the DB migrations:
 - https://github.com/apache/trafficcontrol/pull/6065