[Release 3.7] Disable RHEL8 test_build_image for the release until a …

[dreambeyondorange]

…suitable image is found

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[codecov]

Codecov Report

Merging #5676 (ab68eeb) into release-3.7 (eded3a9) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           release-3.7    #5676   +/-   ##
============================================
  Coverage        89.89%   89.89%           
============================================
  Files              179      179           
  Lines            15366    15366           
============================================
  Hits             13813    13813           
  Misses            1553     1553           

Flag	Coverage Δ
unittests	89.89% <ø> (ø)

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