Different id returned when GetObject RPC and Exists RPC

[hlts2]

Description:

WHAT

I fixed GetObject RPC and Exists RPC to return the same type of ID. (uuid)

WHY

The different ID type are returned when the user called GetObject RPC and Exists RPC.

Related Issue:

How Has This Been Tested?:

Environment:

• Go Version: 1.18.3
• Docker Version: 20.10.8
• Kubernetes Version: 1.22.0
• NGT Version: 1.14.6

Types of changes:

• Bug fix [type/bug]
• New feature [type/feature]
• Add tests [type/test]
• Security related changes [type/security]
• Add documents [type/documentation]
• Refactoring [type/refactoring]
• Update dependencies [type/dependency]
• Update benchmarks and performances [type/bench]
• Update CI [type/ci]

Changes to Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully ran tests with your changes locally?

Checklist:

• I have read the CONTRIBUTING document.
• I have checked open Pull Requests for the similar feature or fixes?
• I have added tests and benchmarks to cover my changes.
• I have ensured all new and existing tests passed.
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly.

[vdaas-ci]

[CHATOPS:HELP] ChatOps commands.

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• ⏪ /rebase - rebase master
• 🔚 2️⃣ 🔚 /label actions/e2e-deploy - run E2E deploy & integration test

[kpango]

LGTM

[codecov]

Codecov Report

Merging #1709 (c0d99fc) into master (59c0a2c) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1709      +/-   ##
==========================================
+ Coverage   31.47%   31.50%   +0.02%     
==========================================
  Files         385      385              
  Lines       32679    32676       -3     
==========================================
+ Hits        10286    10294       +8     
+ Misses      22002    21992      -10     
+ Partials      391      390       -1     

Impacted Files	Coverage Δ
pkg/agent/core/ngt/handler/grpc/object.go	28.77% <100.00%> (-1.51%)	⬇️
internal/worker/worker.go	84.37% <0.00%> (+0.78%)	⬆️
...nt/core/ngt/service/vqueue/uninserted_index_map.go	78.68% <0.00%> (+5.46%)	⬆️

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