build(deps): bump testcontainers from 7.23.0 to 8.1.2

Bumps [testcontainers](https://github.com/testcontainers/testcontainers-node) from 7.23.0 to 8.1.2.
- [Release notes](https://github.com/testcontainers/testcontainers-node/releases)
- [Commits](https://github.com/testcontainers/testcontainers-node/compare/v7.23.0...v8.1.2)

---
updated-dependencies:
- dependency-name: testcontainers
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

packages/backend-test-utils/package.json

@@ -37,7 +37,7 @@
     "mysql2": "^2.2.5",
     "pg": "^8.3.0",
     "sqlite3": "^5.0.1",
-    "testcontainers": "^7.23.0",
+    "testcontainers": "^8.1.2",
     "uuid": "^8.0.0"
   },
   "devDependencies": {