Record account suspend/silence time and keep track of domain blocks (#10660)

* Record account suspend/silence time and keep track of domain blocks

* Also unblock users who were suspended/silenced before dates were recorded

* Add tests

* Keep track of suspending date for users suspended through the CLI

* Show accurate number of accounts that would be affected by unsuspending an instance

* Change migration to set silenced_at and suspended_at

* Revert "Also unblock users who were suspended/silenced before dates were recorded"

This reverts commit a015c65d2d.

* Switch from using suspended and silenced to suspended_at and silenced_at

* Add post-deployment migration script to remove `suspended` and `silenced` columns

* Use Account#silence! and Account#suspend! instead of updating the underlying property

* Add silenced_at and suspended_at migration to post-migration

* Change account fabricator to translate suspended and silenced attributes

* Minor fixes

* Make unblocking domains always retroactive

spec/lib/feed_manager_spec.rb

@@ -168,13 +168,13 @@ RSpec.describe FeedManager do
 
       it 'returns true for status by silenced account who recipient is not following' do
         status = Fabricate(:status, text: 'Hello world', account: alice)
-        alice.update(silenced: true)
+        alice.silence!
         expect(FeedManager.instance.filter?(:mentions, status, bob.id)).to be true
       end
 
       it 'returns false for status by followed silenced account' do
         status = Fabricate(:status, text: 'Hello world', account: alice)
-        alice.update(silenced: true)
+        alice.silence!
         bob.follow!(alice)
         expect(FeedManager.instance.filter?(:mentions, status, bob.id)).to be false
       end