Fix uninstall for amazon linux 2

[dereknola]

Proposed Changes

• Fix uninstall script to correctly identify Amazon Linux 2 OS file (this is basically the same fix as Support Amazon Linux 2 rpm installs #6429)

Types of Changes

Verification

See issue, followed QA reproduction

Testing

Linked Issues

#6521

User-Facing Change

Further Comments

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 9.54%. Comparing base (b220a18) to head (0f921d3).

❗ There is a different number of reports uploaded between BASE (b220a18) and HEAD (0f921d3). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (b220a18)	HEAD (0f921d3)
unittests	1	0

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #6884       +/-   ##
==========================================
- Coverage   25.11%   9.54%   -15.57%     
==========================================
  Files          33      33               
  Lines        2839    2839               
==========================================
- Hits          713     271      -442     
- Misses       2079    2545      +466     
+ Partials       47      23       -24     

Flag	Coverage Δ
inttests	9.54% <ø> (ø)
unittests	?

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