Integration test : Sync mode + db reset option + cleaning (#8376)

Run the CI integrationin sync mode
and add the option to run it without db reset
cleaning all the useless integration test

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Co-authored-by: guillim <guillaume@twenty.com>

packages/twenty-server/jest-integration.config.ts

@@ -14,6 +14,7 @@ const jestConfig: JestConfigWithTsJest = {
   globalSetup: '<rootDir>/test/integration/utils/setup-test.ts',
   globalTeardown: '<rootDir>/test/integration/utils/teardown-test.ts',
   testTimeout: 15000,
+  maxWorkers: 1,
   moduleNameMapper: {
     ...pathsToModuleNameMapper(tsConfig.compilerOptions.paths, {
       prefix: '<rootDir>/../..',