Relax quality gates for clang-tidy.

Currently it can not handle the 'if constexpr' expressions.

Jenkinsfile

@@ -563,7 +563,7 @@ pipeline {
               recordIssues enabledForFailure: true, filters: [
                 excludeFile('.*\\.conan.*')],
                 tools: [clangTidy(name: 'Clang-Tidy', pattern: 'build/build.log')],
-                qualityGates: [[threshold: 247, type: 'TOTAL', unstable: true]]
+                qualityGates: [[threshold: 260, type: 'TOTAL', unstable: true]]
             }
           }
         }