fix: ignore tag injection when the key exists

[lilai23]

What type of PR is this?

Bug

What this PR does / why we need it?

ignore tag injection when the key exists

Which issue(s) this PR fixes？

Fixes #1674

Does this PR introduce a user-facing change?

No

Checklist

• Make sure there is a GitHub_issue related with this PR before you start working on it.
• Make sure you have squashed your change to one single commit.
• GitHub Actions works fine in this PR.

[codecov]

Codecov Report

Attention: Patch coverage is 32.50000% with 27 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...ion/okhttpv2/interceptors/OkHttp2xInterceptor.java	50.00%	1 Missing and 2 partials ⚠️
.../interceptors/AlibabaDubboConsumerInterceptor.java	33.33%	1 Missing and 1 partial ⚠️
...2/interceptors/ApacheDubboConsumerInterceptor.java	33.33%	1 Missing and 1 partial ⚠️
...3/interceptors/ApacheDubboConsumerInterceptor.java	33.33%	1 Missing and 1 partial ⚠️
...n/grpc/interceptors/ClientCallImplInterceptor.java	33.33%	1 Missing and 1 partial ⚠️
...clientv3/interceptors/HttpClient3xInterceptor.java	33.33%	1 Missing and 1 partial ⚠️
...clientv4/interceptors/HttpClient4xInterceptor.java	33.33%	1 Missing and 1 partial ⚠️
...jdkhttp/interceptors/JdkHttpClientInterceptor.java	33.33%	1 Missing and 1 partial ⚠️
...n/kafka/interceptors/KafkaProducerInterceptor.java	33.33%	1 Missing and 1 partial ⚠️
.../interceptors/RocketmqProducerSendInterceptor.java	0.00%	1 Missing and 1 partial ⚠️
... and 3 more

Flag	Coverage Δ	Complexity Δ
unittests	44.19% <32.50%> (-0.03%)	181.00 <0.00> (ø)

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

Files with missing lines	Coverage Δ	Complexity Δ
.../interceptors/AlibabaDubboConsumerInterceptor.java	64.00% <33.33%> (-4.19%)	0.00 <0.00> (ø)
...2/interceptors/ApacheDubboConsumerInterceptor.java	64.00% <33.33%> (-4.19%)	0.00 <0.00> (ø)
...3/interceptors/ApacheDubboConsumerInterceptor.java	64.00% <33.33%> (-4.19%)	0.00 <0.00> (ø)
...n/grpc/interceptors/ClientCallImplInterceptor.java	66.66% <33.33%> (-4.17%)	0.00 <0.00> (ø)
...clientv3/interceptors/HttpClient3xInterceptor.java	56.00% <33.33%> (-3.10%)	0.00 <0.00> (ø)
...clientv4/interceptors/HttpClient4xInterceptor.java	57.69% <33.33%> (-3.18%)	0.00 <0.00> (ø)
...jdkhttp/interceptors/JdkHttpClientInterceptor.java	51.51% <33.33%> (-1.82%)	0.00 <0.00> (ø)
...n/kafka/interceptors/KafkaProducerInterceptor.java	59.25% <33.33%> (-3.25%)	0.00 <0.00> (ø)
.../interceptors/RocketmqProducerSendInterceptor.java	63.33% <0.00%> (-4.53%)	0.00 <0.00> (ø)
...5/interceptor/RocketmqProducerSendInterceptor.java	63.33% <0.00%> (-4.53%)	0.00 <0.00> (ø)
... and 3 more

... and 2 files with indirect coverage changes