feat: add organization details to audit log response (#13961)

* Allow creating test audits with nil org

Not all audit entries have organization IDs, so this will allow us to
test those cases.

* Add organization details to audit log queries

* Add organization to audit log response

This replaces the old ID.  This is a breaking change but organizations
were not being used before.

coderd/database/queries/auditlogs.sql

@@ -18,6 +18,9 @@ SELECT
     users.deleted AS user_deleted,
     users.theme_preference AS user_theme_preference,
     users.quiet_hours_schedule AS user_quiet_hours_schedule,
+    COALESCE(organizations.name, '') AS organization_name,
+    COALESCE(organizations.display_name, '') AS organization_display_name,
+    COALESCE(organizations.icon, '') AS organization_icon,
     COUNT(audit_logs.*) OVER () AS count
 FROM
     audit_logs
@@ -46,6 +49,7 @@ FROM
 				workspaces.id = workspace_builds.workspace_id AND
 				workspace_builds.build_number = 1
 			)
+		LEFT JOIN organizations ON audit_logs.organization_id = organizations.id
 WHERE
     -- Filter resource_type
 	CASE