feat: add CONTAINS_KEY_LIKE operator

[GurtejSohi]

Description

Propagating the changes from gateway-service(hypertrace/gateway-service#136) to here, this PR adds CONTAINS_KEY_LIKE operator for doing a regex based search on map fields (on map key column).

[codecov]

Codecov Report

Merging #104 (6a61766) into main (5b612df) will decrease coverage by 0.01%.
The diff coverage is 66.66%.

@@             Coverage Diff              @@
##               main     #104      +/-   ##
============================================
- Coverage     58.37%   58.36%   -0.02%     
  Complexity      255      255              
============================================
  Files            87       87              
  Lines          1307     1309       +2     
  Branches         39       39              
============================================
+ Hits            763      764       +1     
- Misses          514      515       +1     
  Partials         30       30              

Flag	Coverage Δ
unit	58.36% <66.66%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../core/graphql/utils/gateway/OperatorConverter.java	0.00% <0.00%> (ø)
...a/results/arguments/filter/FilterOperatorType.java	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5b612df...6a61766. Read the comment docs.

[github-actions]

Unit Test Results

32 files  ±0  32 suites  ±0   33s ⏱️ ±0s
98 tests ±0  98 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 47b1e94. ± Comparison against base commit 5b612df.