feat: add kubernete_workflow_tool property to the kubernetes schema

[michalrom089]

Description of the change

Currently, users can only select custom workflow through the UI. A user has requested to be able to do it through the provider also.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation (non-breaking change that adds documentation)

Related issues

Support custom workflow for kubernetes stack through terraform creation.

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development
• Examples for new resources and data sources have been added
• Default values have been documented in the description (e.g., "Dummy: (Boolean) Blah blah. Defaults to false.)
• If the action fails that checks the documentation: Run go generate to make sure the docs are up to date

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• Pull Request is no longer marked as "draft"
• Reviewers have been assigned
• Changes have been reviewed by at least one other engineer

[michalrom089]

Tests fail because we don't handle pages here

and the error is very vague due to some sync problems, I will try to tackle this too - it is thrown here, it continues on error and gets overridden:

	err = g.checkError(response, err)
	if err == nil {
		req.environmentID = gitlab.Int(environment.ID)
		return nil
	}

EDIT: here's a fix

[mwasilew2]

Nice!

As for the release, please hold on until the backend fix is deployed to production