fix: use remote address instead of client ip

[starsz]

Please answer these questions before submitting a pull request, or your PR will get closed.

Why submit this pull request?
Now, we use the gin's context.ClientIP.This function will parse the IP from the header X-Forwarded-For and X-Real-Ip
which will bypass the ipfilter middleware.

• Bugfix
• New feature provided
• Improve performance
• Backport patches

What changes will this PR take into?

Use remote address instead of client ip.

Checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first

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[codecov-commenter]

Codecov Report

Merging #1831 (5e04afc) into master (f146898) will decrease coverage by 9.81%.
The diff coverage is 100.00%.

❗ Current head 5e04afc differs from pull request most recent head 5c52a25. Consider uploading reports for the commit 5c52a25 to get more accurate results

@@            Coverage Diff             @@
##           master    #1831      +/-   ##
==========================================
- Coverage   71.62%   61.81%   -9.82%     
==========================================
  Files         172       47     -125     
  Lines        6119     3177    -2942     
  Branches      711        0     -711     
==========================================
- Hits         4383     1964    -2419     
+ Misses       1487      899     -588     
- Partials      249      314      +65     

Flag	Coverage Δ
backend-e2e-test	46.08% <100.00%> (-0.03%)	⬇️
backend-e2e-test-ginkgo	49.03% <100.00%> (-0.04%)	⬇️
backend-unit-test	?
frontend-e2e-test	?

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

Impacted Files	Coverage Δ
api/internal/filter/ip_filter.go	56.09% <100.00%> (-15.70%)	⬇️
api/internal/utils/runtime/runtime.go	0.00% <0.00%> (-64.29%)	⬇️
api/internal/core/store/validate_mock.go	0.00% <0.00%> (-50.00%)	⬇️
api/internal/filter/authentication.go	47.22% <0.00%> (-30.56%)	⬇️
api/internal/core/store/store.go	59.88% <0.00%> (-28.15%)	⬇️
api/internal/handler/service/service.go	66.08% <0.00%> (-26.09%)	⬇️
api/internal/handler/global_rule/global_rule.go	64.51% <0.00%> (-19.36%)	⬇️
...pi/internal/handler/plugin_config/plugin_config.go	59.57% <0.00%> (-18.09%)	⬇️
api/internal/handler/consumer/consumer.go	75.00% <0.00%> (-16.08%)	⬇️
api/internal/utils/json_patch.go	44.82% <0.00%> (-13.80%)	⬇️
... and 140 more

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