Reorganize Aurora > Compiling and Linking; Example Program and Makefile page especially needs update

[felker]

discussed with @cjknight on Slack

https://docs.alcf.anl.gov/aurora/compiling-and-linking/aurora-example-program-makefile/

Just renamed ./set_affinity_gpu_sunspot.sh script in b795ad7 in #795, but it is unclear what is old content, or redundant content with https://docs.alcf.anl.gov/aurora/running-jobs-aurora/, and it seems we need more info on compiling and linking. The Running Jobs on Polaris (barely mentioning compiling; more detail on task binding and affinity)
vs. Example Programs and Makefiles for Polaris (faster survey of different use cases: CPU OpenMP vs. GPU OpenMP vs. ...) content division is similar, but more clear-cut.

Related #614

• Move Aurora > Build Tools > CMake (only page in Build Tools dropdown) to Compiling and Linking dropdown?
• In Example Programs and Makefiles for Polaris page, there are compile commands that are useful, but not a single Makefile. Rename this and the Aurora page?
• We still could use separate pages on each of the compiler families:

  user-guides/mkdocs.yml

  Lines 476 to 478 in 1fd2be6

  	aurora/compiling-and-linking/llvm-compilers-aurora.md
  	aurora/compiling-and-linking/gnu-compilers-aurora.md
  	aurora/compiling-and-linking/cce-compilers-aurora.md