Secrets: encryption encryption storage uses versioning (#108036)

* Secrets: delete unused FakeKeeper

* Secrets: encrypted value storage stores versions

* add version to span

* trigger build

* remove ineffectual assignment

* lint

* drop secret_encrypted_value.uid / add name and version columns

pkg/storage/secret/encryption/testdata/sqlite--encrypted_value_update-update.sql

@@ -3,6 +3,8 @@ UPDATE
 SET
   "encrypted_data" = '[115 101 99 114 101 116]',
   "updated" = 5679
-WHERE "namespace" = 'ns' AND
-  "uid" = 'abc123'
+WHERE 
+  "namespace" = 'ns' AND
+  "name" = 'n1' AND
+  "version" = 1
 ;