fix(sdk): Reports API: Add missing ">" and "<" ops to filter expr

[andrewtruong]

Description

Adds missing > and < ops from filter expr

• I updated CHANGELOG.md, or it's not applicable

Testing

How was this PR tested?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.79%. Comparing base (07f19a6) to head (ba6210e).
Report is 59 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7670      +/-   ##
==========================================
+ Coverage   74.28%   75.79%   +1.51%     
==========================================
  Files         500      500              
  Lines       55658    54052    -1606     
==========================================
- Hits        41345    40971     -374     
+ Misses      13907    12674    -1233     
- Partials      406      407       +1     

Flag	Coverage Δ
func	41.39% <0.00%> (+0.02%)	⬆️
system	63.43% <100.00%> (-0.06%)	⬇️
unit	56.35% <100.00%> (+0.96%)	⬆️

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Files	Coverage Δ
wandb/apis/reports/v2/internal.py	93.68% <100.00%> (ø)

... and 107 files with indirect coverage changes