Skip updating WRED profiles with wred_green_enabled=false

[mramezani95]

Description of PR

This PR ports the following two PRs from 202412 to master:
Azure/sonic-mgmt.msft#1024
Azure/sonic-mgmt.msft#1188

Summary:
Skip updating WRED profiles for which wred_green_enabled is false.

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• New Test case
  • Skipped for non-supported platforms
• Test case improvement

Back port request

• 202205
• 202305
• 202311
• 202405
• 202411
• 202505
• 202511

Approach

What is the motivation for this PR?

Ensuring that tests don't fail when for some WRED profiles, wred_green_enabled=false.

How did you do it?

We set all delta values to 0 if wred_green_enabled=false for a WRED profile and do not create a JSON patch for that profile.

How did you verify/test it?

Ran the tests:

generic_config_updater/test_ecn_config_update.py::test_ecn_config_updates[None-replace-green_min_threshold] PASSED                                    [ 25%]
generic_config_updater/test_ecn_config_update.py::test_ecn_config_updates[None-replace-green_max_threshold] PASSED                                    [ 50%]
generic_config_updater/test_ecn_config_update.py::test_ecn_config_updates[None-replace-green_drop_probability] PASSED                                 [ 75%]
generic_config_updater/test_ecn_config_update.py::test_ecn_config_updates[None-replace-green_min_threshold,green_max_threshold,green_drop_probability] PASSED [100%]

Any platform specific information?

N/A

Supported testbed topology if it's a new test case?

N/A

Documentation

N/A

[mssonicbld]

/azp run

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