[Feature] Improve modularity of test cases implementation

[martin-mat]

Is your feature request related to a problem? Please describe.
Test case implementation contains code that is repeated/duplicated across tests or have unnecessary dependency on test information on other part of the code. Examples:

• test category for certification. This is defined on 2 places - as a tag in points.yml and ten also as an emoji on several places in test case implementation in a string that needs to be printed out in case of test pass/fail/skip. In case that one needs to change test category, they need to change in on all those places.
• Emojis in test case implementation. In every test case it needs to be explicitly put a ✔ emoji when PASSED, ✖ when failed etc... along with other reporting decorations. When one wants to change how tests are reported, it needs to be changed in every test case. Redundacy is a "good" base for inconsistency.
• time reporting using task_start_time repeats for each test case
• test case/test category emoji handling repeats for each test case

Describe the solution you'd like
Improve test case implementation and reporting modularity. Avoid information redundancy in code as much as possible. Aoid need for copy/pasting as much as possible. Use more modularity/classes.

Describe alternatives you've considered
An alternativu woul be to keep the code as it is. However it is a pain to add or change a test case with keeping everything consistent.

**How will this be tested? aka Acceptance Criteria (optional) **
full regression test run pass

(optional: unnecessary for things like some version bumps etc.)

Once this issue is addressed how will the fix be verified?
full regression test run pass

Additional context

[martin-mat]

Hello, @agentpoyo, can you please assign this one to me? I'm already work in progress with that and about to propose a change for review.

[martin-mat]

@wavell @denverwilliams @agentpoyo please review (do not merge for now, see PR cncf#1867 description).

[agentpoyo]

@wavell @denverwilliams @agentpoyo please review (do not merge for now, see PR #1867 description).

I updated the title to be "WIP". You can also create "Draft" pull requests to prevent merges.