Describe the bug

After this PR change, #28770, integ-runner doesn't work anymore when specifying test files, i.e. yarn integ test/aws-apigatewayv2-integrations/test/websocket/integ.aws.t --update-on-failed.

Expected Behavior

Should work and run the integration test.

Current Behavior

Invalid values:
  Argument: language, Given: "test/aws-apigatewayv2-integrations/test/websocket/integ.aws.js", Choices: "javascript", "typescript", "python", "go"

Reproduction Steps

Pull latest main

Possible Solution

No response

Additional Information/Context

No response

CDK CLI Version

N/A

Framework Version

No response

Node.js Version

N/A

OS

N/A

Language

TypeScript

Language Version

No response

Other information

No response