Orjson and rate limiting changes

[munrojm]

This PR contains:

• Changed input args to ReadOnlyResource to be commensurate with orjson inclusion in maggma.
• Disabled client side rate limiting for endpoints other than api.materialsproject.org

[codecov-commenter]

Codecov Report

Merging #328 (1bca698) into main (a219354) will decrease coverage by 0.34%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #328      +/-   ##
==========================================
- Coverage   89.45%   89.11%   -0.35%     
==========================================
  Files          59       59              
  Lines        1916     1920       +4     
==========================================
- Hits         1714     1711       -3     
- Misses        202      209       +7     

Impacted Files	Coverage Δ
src/mp_api/core/ratelimit.py	100.00% <100.00%> (ø)
src/mp_api/routes/elasticity/client.py	72.72% <0.00%> (-21.22%)	⬇️

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