Gateway API tutorials

[strekm]

Description

Extend Istio tutorials to include Gateway API tutorials: how to expose httpbin, how to expose tcp sample app. Both tutorials should mention installation of Gateway API CRDs. Exposing tcp sample app should include experimental Gateway API support.

AC:

• Istio tutorials extended with tutorial how to expose httpbin with Gateway API
• Istio tutorials extended with tutorial how to expose tcp app Gateway API in experimental module

Reasons

DoD:
- [ ] Provide unit and integration tests.

• Provide documentation.
  - [ ] Verify if the solution works for both open-source Kyma and SAP BTP, Kyma runtime.
  - [ ] If you changed the resource limits, explain why it was needed.
  - [ ] If the default configuration of Istio Operator has been changed, you performed a manual upgrade test to verify that the change can be rolled out correctly.
  - [ ] Verify that your contributions don't decrease code coverage. If they do, explain why this is the case.
  - [ ] Add release notes.

Attachments
part of: #669