fix: Clean privilege cache after loading policy in InitPolicyInfo (#43642)

- issue: #43641

Signed-off-by: SimFG <bang.fu@zilliz.com>

internal/proxy/meta_cache.go

@@ -1133,6 +1133,7 @@ func (m *MetaCache) InitPolicyInfo(info []string, userRoles []string) {
 		if err != nil {
 			log.Error("failed to load policy after RefreshPolicyInfo", zap.Error(err))
 		}
+		CleanPrivilegeCache()
 	}()
 	m.mu.Lock()
 	defer m.mu.Unlock()