feat: sliding window and rt quantile metrics

[ev1lQuark]

• Implement sliding window and wrapper it around t-digest algorithm.
• Implement rt p50, p90, p95, p99.

# HELP dubbo_consumer_rt_milliseconds_p50 
# TYPE dubbo_consumer_rt_milliseconds_p50 gauge
dubbo_consumer_rt_milliseconds_p50{application_name="dubbo.io",group="dubbo-go",hostname="not implemented yet",interface="org.apache.dubbogo.samples.api.Greeter",ip="192.168.48.156",method="",version="3.0.1"} 171
# HELP dubbo_consumer_rt_milliseconds_p90 
# TYPE dubbo_consumer_rt_milliseconds_p90 gauge
dubbo_consumer_rt_milliseconds_p90{application_name="dubbo.io",group="dubbo-go",hostname="not implemented yet",interface="org.apache.dubbogo.samples.api.Greeter",ip="192.168.48.156",method="",version="3.0.1"} 201.39999999999998
# HELP dubbo_consumer_rt_milliseconds_p95 
# TYPE dubbo_consumer_rt_milliseconds_p95 gauge
dubbo_consumer_rt_milliseconds_p95{application_name="dubbo.io",group="dubbo-go",hostname="not implemented yet",interface="org.apache.dubbogo.samples.api.Greeter",ip="192.168.48.156",method="",version="3.0.1"} 201.95000000000002
# HELP dubbo_consumer_rt_milliseconds_p99 
# TYPE dubbo_consumer_rt_milliseconds_p99 gauge
dubbo_consumer_rt_milliseconds_p99{application_name="dubbo.io",group="dubbo-go",hostname="not implemented yet",interface="org.apache.dubbogo.samples.api.Greeter",ip="192.168.48.156",method="",version="3.0.1"} 202

[codecov-commenter]

Codecov Report

Merging #2356 (f7bb4e2) into main (f6fdbfd) will increase coverage by 0.09%.
The diff coverage is 77.77%.

@@            Coverage Diff             @@
##             main    #2356      +/-   ##
==========================================
+ Coverage   44.27%   44.37%   +0.09%     
==========================================
  Files         294      297       +3     
  Lines       18019    18127     +108     
==========================================
+ Hits         7978     8043      +65     
- Misses       9194     9232      +38     
- Partials      847      852       +5     

Impacted Files	Coverage Δ
metrics/util/aggregate/pane.go	60.00% <60.00%> (ø)
metrics/util/aggregate/quantile.go	76.00% <76.00%> (ø)
metrics/util/aggregate/sliding_window.go	76.92% <76.92%> (ø)
metrics/prometheus/model.go	39.22% <78.26%> (+5.68%)	⬆️
metrics/prometheus/metric_set.go	100.00% <100.00%> (ø)
metrics/prometheus/reporter.go	76.08% <100.00%> (+0.53%)	⬆️

... and 2 files with indirect coverage changes

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[chickenlj]

LGTM.