Add Remember Me Enabled to Application Settings

What does this MR do and why?

Describe in detail what your merge request does and why.

Part one of https://gitlab.com/gitlab-org/gitlab/-/issues/369133

Adds a new column to application_settings called remember_me_enabled. The column defaults to true to retain existing default behavior.

This feature will be useful along with a reduced session time for customers with increased compliance requirements around session expiration.

Database

Migrate

main: == [advisory_lock_connection] object_id: 274440, pg_backend_pid: 41658
main: == 20230501163253 AddRememberMeEnabledToApplicationSettings: migrating ========
main: -- add_column(:application_settings, :remember_me_enabled, :boolean, {:default=>true, :null=>false})
main:    -> 0.0036s
main: == 20230501163253 AddRememberMeEnabledToApplicationSettings: migrated (0.0077s)

main: == [advisory_lock_connection] object_id: 274440, pg_backend_pid: 41658
ci: == [advisory_lock_connection] object_id: 274680, pg_backend_pid: 41660
ci: == 20230501163253 AddRememberMeEnabledToApplicationSettings: migrating ========
ci: -- add_column(:application_settings, :remember_me_enabled, :boolean, {:default=>true, :null=>false})
ci:    -> 0.0022s
ci: == 20230501163253 AddRememberMeEnabledToApplicationSettings: migrated (0.0100s)

ci: == [advisory_lock_connection] object_id: 274680, pg_backend_pid: 41660

Rollback

main: == [advisory_lock_connection] object_id: 274780, pg_backend_pid: 1632
main: == 20230501163253 AddRememberMeEnabledToApplicationSettings: reverting ========
main: -- remove_column(:application_settings, :remember_me_enabled, :boolean, {:default=>true, :null=>false})
main:    -> 0.0025s
main: == 20230501163253 AddRememberMeEnabledToApplicationSettings: reverted (0.0087s)

main: == [advisory_lock_connection] object_id: 274780, pg_backend_pid: 1632
ci: == [advisory_lock_connection] object_id: 274720, pg_backend_pid: 2088
ci: == 20230426102200 FixImportSourcesOnApplicationSettingsAfterPhabricatorRemoval: reverting
ci: -- The migration is skipped since it modifies the schemas: [:gitlab_main].
ci: -- This database can only apply migrations in one of the following schemas: [:gitlab_ci, :gitlab_shared, :gitlab_internal].
ci: == 20230426102200 FixImportSourcesOnApplicationSettingsAfterPhabricatorRemoval: reverted (0.0080s)

ci: == [advisory_lock_connection] object_id: 274720, pg_backend_pid: 2088

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