{Test} Fix or skip live tests for cdn, privatedns, reservations

[fengzhou-msft]

Description

Make some tests record_only as they rely on existing resources in another subscription or require extra permissions such as reservation purchases.

Add retry for reimporting network private-dns zone as we are seeing more failures due to resource privioning not finished before calling the command.

Testing Guide

Test results: https://dev.azure.com/azure-sdk/internal/_build/results?buildId=648963&view=artifacts&pathAsName=false&type=publishedArtifacts

History Notes

[Component Name 1] BREAKING CHANGE: az command a: Make some customer-facing breaking change.
[Component Name 2] az command b: Add some customer-facing feature.

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[qwordy]

Skip does not fix them. Should we skip test that we can't fix to let data be beautiful?

[haroldrandom]

test_aro_delete Could you rerun the test? Or replace the network API version to fix CI?

[fengzhou-msft]

Skip does not fix them. Should we skip test that we can't fix to let data be beautiful?

These tests rely on existing resources of another subscription and when the live test pipeline tests them with our subscription, it would have resource not found error or permission error.

The best way to fix it is to rewrite the tests to create the resources during the test if the resource does not require extra permissions or we apply for relative permissions (we have fixed some tests in this way before).

The second best way is to create resources in our subscription and lock them for usage in live tests if the creation of such resources is very time-consuming.

The least we want to do is to skip the test, but it's difficult to fix some tests due to permission issues or complexity. The failure of such tests does not tell us the real issues. I think it's OK to skip them now. When we or service teams have more resources, we can rewrite those tests. I think we will evaulate test coverage sometime in the future.

[fengzhou-msft]

test_aro_delete Could you rerun the test? Or replace the network API version to fix CI?

submitted #16226