Band structure, DOS, and charge density changes

[munrojm]

This PR updates the client so it can properly receive msgpacked and compressed byte data for band structures and density of states. Additionally, charge density downloads are now handled through S3 urls client side.

[codecov-commenter]

Codecov Report

Merging #577 (d0ec494) into main (b877ae9) will decrease coverage by 0.14%.
The diff coverage is 85.29%.

@@            Coverage Diff             @@
##             main     #577      +/-   ##
==========================================
- Coverage   92.45%   92.31%   -0.15%     
==========================================
  Files          34       34              
  Lines        1326     1353      +27     
==========================================
+ Hits         1226     1249      +23     
- Misses        100      104       +4     

Impacted Files	Coverage Δ
src/mp_api/core/settings.py	100.00% <ø> (ø)
src/mp_api/routes/bonds.py	95.83% <ø> (ø)
src/mp_api/routes/dielectric.py	95.45% <ø> (ø)
src/mp_api/routes/elasticity.py	96.66% <ø> (ø)
src/mp_api/routes/electrodes.py	96.42% <ø> (ø)
src/mp_api/routes/eos.py	94.44% <ø> (ø)
src/mp_api/routes/grain_boundary.py	97.05% <ø> (ø)
src/mp_api/routes/magnetism.py	96.29% <ø> (ø)
src/mp_api/routes/materials.py	74.57% <0.00%> (ø)
src/mp_api/routes/molecules.py	93.10% <ø> (ø)
... and 11 more

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