[BUG] expectFail is not a valid option for HTTP tests, but there is no error

[terraboops]

Describe the bug
Currently, setting expectFail on an HTTP test results in no error even though it's not a valid option. This is confusing.

To Reproduce
Example test plan:

testPlan:
  name: "owo"
  description: "uwu
  testTargets:
  - name: "Basic connectivity :3"
    podSelector:
      labels: "name=my-cool-app
      mode: "random"
    tests:
    - name: "EC2 metadata endpoint is blocked"
      endpoint: "http://169.254.169.254/latest/meta-data/"
      statusCode: 401 # Expect failure
      expectFail: true
      timeout: 5s

Expected behavior
This should produce an error, since expectFail isn't applicable to HTTP tests.

Development Environment (please complete the following information):
Runner:

• OS: all
• Run in Docker?: N/A
• Kubernetes Version: all