feat: Update the Helm chart name to "gateway"

[minhtule]

Related Tickets & Documents

• Issue: Rename kubernetes-access-gateway to just gateway #253

Changes

Update the Helm chart name to "gateway"

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.06%. Comparing base (f1d9deb) to head (4b800e5).
⚠️ Report is 2 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #255      +/-   ##
==========================================
+ Coverage   82.95%   83.06%   +0.11%     
==========================================
  Files          36       36              
  Lines        2698     2698              
==========================================
+ Hits         2238     2241       +3     
+ Misses        347      343       -4     
- Partials      113      114       +1     

Flag	Coverage Δ
integration	49.64% <ø> (+0.11%)	⬆️
unit	77.76% <ø> (ø)

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see 1 file with indirect coverage changes

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