Improve CMake logic for tutorials

[jngrad]

Description of changes:

• modifying a tutorial dependency (figure or script) in the source directory will automatically update it in the build directory (fixes Make tutorial python scripts proper dependencies #3472)
• tutorials are now fully independent of each other, e.g. make tutorial_04 only re-generates files for tutorial 04 in the build directory
• the list of dependencies for targets tutorials, tutorials_html, tutorials_python are now automatically generated instead of being manually curated

[codecov]

Codecov Report

Merging #3486 into python will decrease coverage by <1%.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           python   #3486   +/-   ##
======================================
- Coverage      87%     87%   -1%     
======================================
  Files         536     536           
  Lines       24400   24400           
======================================
- Hits        21247   21243    -4     
- Misses       3153    3157    +4

Impacted Files	Coverage Δ
src/core/electrostatics_magnetostatics/p3m.cpp	84% <0%> (-1%)	⬇️
src/core/particle_data.cpp	97% <0%> (ø)	⬆️

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