feat: Add initial AuthzQuerier implementation (#5919)

feat: Add initial AuthzQuerier implementation
- Adds package database/dbauthz that adds a database.Store implementation where each method goes through AuthZ checks
- Implements all database.Store methods on AuthzQuerier
- Updates and fixes unit tests where required
- Updates coderd initialization to use AuthzQuerier if codersdk.ExperimentAuthzQuerier is enabled

coderd/database/queries/licenses.sql

@@ -14,6 +14,16 @@ SELECT *
 FROM licenses
 ORDER BY (id);
 
+-- name: GetLicenseByID :one
+SELECT
+	*
+FROM
+	licenses
+WHERE
+	id = $1
+LIMIT
+	1;
+
 -- name: GetUnexpiredLicenses :many
 SELECT *
 FROM licenses