use experimental go json v2 library (#35392)

details: https://pkg.go.dev/encoding/json/v2

---------

Co-authored-by: techknowlogick <matti@mdranta.net>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

.github/workflows/pull-db-tests.yml

@@ -72,13 +72,13 @@ jobs:
           go-version-file: go.mod
           check-latest: true
       - run: make deps-backend
-      - run: make backend
+      - run: GOEXPERIMENT='' make backend
         env:
           TAGS: bindata gogit sqlite sqlite_unlock_notify
       - name: run migration tests
         run: make test-sqlite-migration
       - name: run tests
-        run: make test-sqlite
+        run: GOEXPERIMENT='' make test-sqlite
         timeout-minutes: 50
         env:
           TAGS: bindata gogit sqlite sqlite_unlock_notify
@@ -142,7 +142,7 @@ jobs:
           RACE_ENABLED: true
           GITHUB_READ_TOKEN: ${{ secrets.GITHUB_READ_TOKEN }}
       - name: unit-tests-gogit
-        run: make unit-test-coverage test-check
+        run: GOEXPERIMENT='' make unit-test-coverage test-check
         env:
           TAGS: bindata gogit
           RACE_ENABLED: true