feat: add rpc exception metrics

[ev1lQuark]

Main changes

• implement new metrics:
  • dubbo_provider_requests_failed_total
  • dubbo_consumer_requests_failed_total
  • dubbo_provider_requests_failed_total_aggregate
  • dubbo_consumer_requests_failed_total_aggregate
• fix a metrics naming error

Next to do

According to the type of RPC exception, implement more detailed metrics to refine the granularity.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication

[FoghostCn]

LGTM

[codecov-commenter]

Codecov Report

Merging #2459 (2ae62af) into main (40dd198) will decrease coverage by 0.02%.
The diff coverage is n/a.

❗ Current head 2ae62af differs from pull request most recent head 6dd25d8. Consider uploading reports for the commit 6dd25d8 to get more accurate results

@@            Coverage Diff             @@
##             main    #2459      +/-   ##
==========================================
- Coverage   45.11%   45.10%   -0.02%     
==========================================
  Files         269      269              
  Lines       18190    18190              
==========================================
- Hits         8206     8204       -2     
- Misses       9109     9110       +1     
- Partials      875      876       +1     

see 1 file with indirect coverage changes

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