Update database_cleaner-active_record

We were getting the following error in
`spec/support/database_cleaner.rb`

```
NoMethodError:
  undefined method `schema_migration' for an instance of ActiveRecord::ConnectionAdapters::PostgreSQLAdapter
```

Upgrading `database_cleaner-active_record` fixes this issue. Given that
we appear to depend on this being up-to-date to successfully run the
test suite, I've added this as a test dependency

We did this on GDS recently: alphagov/transition@ade2915

Gemfile

@@ -45,6 +45,7 @@ end
 group :test do
   gem "capybara", ">= 2.15"
   gem "database_cleaner"
+  gem "database_cleaner-active_record"
   gem "launchy"
   gem "selenium-webdriver"
   gem "simplecov"

Gemfile.lock

@@ -120,7 +120,7 @@ GEM
     crass (1.0.6)
     database_cleaner (2.0.2)
       database_cleaner-active_record (>= 2, < 3)
-    database_cleaner-active_record (2.1.0)
+    database_cleaner-active_record (2.2.0)
       activerecord (>= 5.a)
       database_cleaner-core (~> 2.0.0)
     database_cleaner-core (2.0.1)
@@ -389,6 +389,7 @@ GEM
 PLATFORMS
   arm64-darwin-22
   arm64-darwin-23
+  arm64-darwin-24
   x86_64-darwin-21
   x86_64-linux
 
@@ -403,6 +404,7 @@ DEPENDENCIES
   climate_control
   coffee-rails (~> 5.0)
   database_cleaner
+  database_cleaner-active_record
   dotenv-rails
   factory_bot_rails
   faker