[ISSUE #1213] 修复xDS 生成 cacheKey 时缺失 gatewayService

[chuntaojun]

Please provide issue(s) of this PR:
Fixes #1213

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• Does not have any user-facing changes. This may include API changes, behavior changes, performance improvements, etc.

[polaris-test-bot]

2023-08-23 20:56:36: =========TEST START==========
2023-08-23 21:28:37: [STANDALONE VERSION]PR autotest FAILED! We executed 47 test cases and 46 were passed. You can see test report in https://polaris-opentest-1306863770.cos.ap-guangzhou.myqcloud.com/pr1486383196/sta/qta-report.html and https://polaris-opentest-1306863770.cos.ap-guangzhou.myqcloud.com/pr1486383196/sta/ratelimit/qta-report.html
2023-08-23 21:28:41: [CLUSTER VERSION] PR autotest FAILED! We executed 39 test cases and 34 were passed. You can see test report in https://polaris-opentest-1306863770.cos.ap-guangzhou.myqcloud.com/pr1486383196/clu/qta-report.html
2023-08-23 21:28:45: [KUBENETES VERSION]PR autotest FAILED! We executed 39 test cases and 36 were passed. You can see test report in https://polaris-opentest-1306863770.cos.ap-guangzhou.myqcloud.com/pr1486383196/k8s/qta-report.html

[codecov]

Codecov Report

Merging #1214 (fcfdec3) into main (2e59684) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1214      +/-   ##
==========================================
+ Coverage   55.72%   55.73%   +0.01%     
==========================================
  Files         179      179              
  Lines       32432    32432              
==========================================
+ Hits        18072    18077       +5     
+ Misses      12004    12000       -4     
+ Partials     2356     2355       -1     

see 13 files with indirect coverage changes

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