feat: enable key rotation (#15066)

This PR contains the remaining logic necessary to hook up key rotation
to the product.

coderd/database/migrations/000271_cryptokey_features.down.sql

@@ -0,0 +1,18 @@
+-- Step 1: Remove the new entries from crypto_keys table
+DELETE FROM crypto_keys
+WHERE feature IN ('workspace_apps_token', 'workspace_apps_api_key');
+
+CREATE TYPE old_crypto_key_feature AS ENUM (
+    'workspace_apps',
+    'oidc_convert',
+    'tailnet_resume'
+);
+
+ALTER TABLE crypto_keys
+    ALTER COLUMN feature TYPE old_crypto_key_feature
+    USING (feature::text::old_crypto_key_feature);
+
+DROP TYPE crypto_key_feature;
+
+ALTER TYPE old_crypto_key_feature RENAME TO crypto_key_feature;
+