Add support for Azure Linux 3

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 72.01%. Comparing base (3aebcdd) to head (36f26cc). Report is 286 commits behind head on develop.

Files	Patch %	Lines
azurelinuxagent/common/osutil/factory.py	0.00%	0 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #3183 +/- ## =========================================== + Coverage 71.97% 72.01% +0.03% =========================================== Files 103 110 +7 Lines 15692 16593 +901 Branches 2486 2392 -94 =========================================== + Hits 11295 11950 +655 - Misses 3881 4095 +214 - Partials 516 548 +32 ```

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