fix if command in rhel v8.6+ (#2624)

[nagworld9]

(cherry picked from commit e540728)

Description

Issue #

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PR information

• The title of the PR is clear and informative.
• There are a small number of commits, each of which has an informative message. This means that previously merged commits do not appear in the history of the PR. For information on cleaning up the commits in your pull request, see this page.
• If applicable, the PR references the bug/issue that it fixes in the description.
• New Unit tests were added for the changes made

Quality of Code and Contribution Guidelines

• I have read the contribution guidelines.

[codecov]

Codecov Report

Merging #2626 (b7b5899) into develop (e72862c) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff            @@
##           develop    #2626   +/-   ##
========================================
  Coverage    71.97%   71.97%           
========================================
  Files          103      103           
  Lines        15609    15609           
  Branches      2483     2483           
========================================
  Hits         11234    11234           
  Misses        3864     3864           
  Partials       511      511           

Impacted Files	Coverage Δ
azurelinuxagent/common/osutil/factory.py	93.10% <0.00%> (ø)

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