* Fixed -Wreserved-id-macro warnings from header include guards
* Removed all __int64 and LL suffix stuff now that C99 is minimum requirement
* Rename `H5FD_CTL__` to `H5FD_CTL_` to fix -Wreserved-id-macro warnings
Double underscore is reserved in C++ and this public header should be C++ compatible.
* Never define __STDC_FORMAT_MACROS anymore
Defining it causes a -Wreserved-id-macro.
Happily, according to the C++11 standard:
"The macros defined by <stdint> are provided unconditionally. In particular, the symbols __STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS (mentioned in C99 footnotes 219, 220, and 222) play no role in C++."
https://cplusplus.github.io/LWG/issue984
So looks like it's not necessary to define it with reasonably new toolchains.
* Fixed some -Wunused-macros warnings, removed dead code
* Fixed all -Wdouble-promotion warnings in C++ files
* Fixed remaining -Wsuggest-destructor-override warnings
* Committing clang-format changes
Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>