fix issues 124 (cmake), 125 (bigendian) and 126 (coverity) in ci

[jeking3]

• add gha coverity scan (leveraging work I put into boost-ci)
• add gha bigendian build (leveraging work I put into bdde and boost-ci)
• tune codecov exclusionary list
• fix windows gha address-models
• fix cmake

This closes #124 This closes #125 This closes #126

[codecov[bot]]

Codecov Report

Merging #132 (7d5f490) into develop (fb3ec7d) will increase coverage by 0.28%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #132      +/-   ##
===========================================
+ Coverage    60.44%   60.73%   +0.28%     
===========================================
  Files           34       34              
  Lines         1388     1388              
  Branches       593      590       -3     
===========================================
+ Hits           839      843       +4     
  Misses          55       55              
+ Partials       494      490       -4     

Impacted Files	Coverage Δ
include/boost/uuid/uuid_io.hpp	58.94% <0.00%> (ø)
include/boost/uuid/string_generator.hpp	82.85% <0.00%> (+2.85%)	:arrow_up:
include/boost/uuid/random_generator.hpp	81.48% <0.00%> (+3.70%)	:arrow_up:

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[jeking3]

Coverage will omit test files once develop is merged to master.