ci: E2E tests are failing: 'CodeCatalyst API ... key "userCode" has invalid type "object"'

[justinmk3]

seems correlated with #6300 but that might be a coincidence.

  1) Test how this codebase uses the CodeCatalyst API
       "before all" hook in "Test how this codebase uses the CodeCatalyst API":
     Error: Request has the following errors:
	key "userCode" has invalid type "object", expected one of [ string ]
      at invokeLambda (/codebuild/output/src2128598327/src/github.com/aws/aws-toolkit-vscode/packages/core/src/test/setupUtil.ts:181:23)
      at processTicksAndRejections (node:internal/process/task_queues:95:5)
      at async Object.<anonymous> (/codebuild/output/src2128598327/src/github.com/aws/aws-toolkit-vscode/packages/core/src/test/setupUtil.ts:233:21)
      at async openSsoUrl (/codebuild/output/src2128598327/src/github.com/aws/aws-toolkit-vscode/packages/core/src/auth/sso/model.ts:149:24)
      at async openBrowserAndWaitUntilComplete (/codebuild/output/src2128598327/src/github.com/aws/aws-toolkit-vscode/packages/core/src/auth/sso/ssoAccessTokenProvider.ts:464:19)
      at async DeviceFlowAuthorization.authorize (/codebuild/output/src2128598327/src/github.com/aws/aws-toolkit-vscode/packages/core/src/auth/sso/ssoAccessTokenProvider.ts:482:33)
      at async DeviceFlowAuthorization.runFlow (/codebuild/output/src2128598327/src/github.com/aws/aws-toolkit-vscode/packages/core/src/auth/sso/ssoAccessTokenProvider.ts:142:28)
      at async DeviceFlowAuthorization.createToken (/codebuild/output/src2128598327/src/github.com/aws/aws-toolkit-vscode/packages/core/src/auth/sso/ssoAccessTokenProvider.ts:125:24)
      at async Auth.createConnection (/codebuild/output/src2128598327/src/github.com/aws/aws-toolkit-vscode/packages/core/src/auth/auth.ts:343:51)
      at async useCodeCatalystSsoConnection (/codebuild/output/src2128598327/src/github.com/aws/aws-toolkit-vscode/packages/core/src/testE2E/codecatalyst/client.test.ts:448:49)
      at async createTestCodeCatalystClient (/codebuild/output/src2128598327/src/github.com/aws/aws-toolkit-vscode/packages/core/src/testE2E/codecatalyst/client.test.ts:427:22)
      at async /codebuild/output/src2128598327/src/github.com/aws/aws-toolkit-vscode/packages/core/src/testE2E/codecatalyst/client.test.ts:105:22
      at async Context.<anonymous> (/codebuild/output/src2128598327/src/github.com/aws/aws-toolkit-vscode/packages/core/src/testE2E/codecatalyst/client.test.ts:101:9)