Add R2SCAN to run_types

[shyamd]

Adds R2SCAN to the run_type

[codecov-commenter]

Codecov Report

Merging #214 (ccfe9f7) into main (03592ab) will decrease coverage by 9.96%.
The diff coverage is 81.15%.

@@            Coverage Diff             @@
##             main     #214      +/-   ##
==========================================
- Coverage   95.33%   85.36%   -9.97%     
==========================================
  Files          25       36      +11     
  Lines        1736     1777      +41     
==========================================
- Hits         1655     1517     -138     
- Misses         81      260     +179     

Impacted Files	Coverage Δ
emmet-builders/emmet/builders/vasp/materials.py	83.62% <59.37%> (ø)
...s/emmet/builders/materials/electronic_structure.py	64.70% <64.70%> (ø)
emmet-core/emmet/core/oxidation_states.py	73.17% <73.17%> (ø)
emmet-core/emmet/core/vasp/validation.py	86.58% <77.77%> (-2.15%)	⬇️
emmet-builders/emmet/builders/materials/search.py	88.46% <88.46%> (ø)
emmet-core/emmet/core/electronic_structure.py	89.06% <89.06%> (ø)
emmet-core/emmet/core/search.py	91.34% <91.34%> (ø)
emmet-builders/emmet/builders/__init__.py	71.42% <100.00%> (ø)
emmet-builders/emmet/builders/settings.py	100.00% <100.00%> (ø)
...met-builders/emmet/builders/vasp/task_validator.py	86.95% <100.00%> (ø)
... and 40 more

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