Normalize header guard macros

[greenc-FNAL]

• Avoid using reserved macro names (leading __).
• Macro form is X_Y_..._HEADER_EXT, where X is the first subdirectory from the top level of the Phlex repository, and HEADER_EXT is the full capitalized base name of the
  header file.

[knoepfel]

Do we want to mandate a comment following the closing #endif? Some files have

#endif // SOME_FILE_NAME_EXT

and some just have #endif with no trailing comment.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@            Coverage Diff             @@
##             main     #370      +/-   ##
==========================================
- Coverage   85.32%   85.20%   -0.13%     
==========================================
  Files         122      122              
  Lines        2433     2433              
  Branches      389      389              
==========================================
- Hits         2076     2073       -3     
- Misses        232      233       +1     
- Partials      125      127       +2     

Flag	Coverage Δ
unittests	85.20% <ø> (-0.13%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
form/form/config.hpp	100.00% <ø> (ø)
form/form/form.hpp	100.00% <ø> (ø)
form/form/technology.hpp	66.66% <ø> (ø)
form/persistence/ipersistence.hpp	100.00% <ø> (ø)
form/persistence/persistence.hpp	100.00% <ø> (ø)
form/root_storage/root_tbranch_container.hpp	100.00% <ø> (ø)
form/storage/istorage.hpp	100.00% <ø> (ø)
form/storage/storage.hpp	100.00% <ø> (ø)
form/storage/storage_association.hpp	100.00% <ø> (ø)
form/storage/storage_container.hpp	100.00% <ø> (ø)
... and 4 more

... and 2 files with indirect coverage changes

---

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[greenc-FNAL]

Do we want to mandate a comment following the closing #endif? Some files have

#endif // SOME_FILE_NAME_EXT

and some just have #endif with no trailing comment.

The script was supposed to annotate the #endif, but appears not to be 100% effective. I will audit the headers properly in the morning.

[aolivier23]

Looks good to me. I payed special attention to the FORM include guards.

[gemmeren]

Thanks Chris