[filterprocessor] filter metrics using resource attributes

[hossain-rayhan]

Description:
New Feature: This contribution adds the capability of filtering metrics using resource attributes.
Current filter processor can include/exclude metrics based on metric_name field. However, It would be good if we can filter metrics using metric_name and resource attributes together. For example, we have container.cpu.utilized metrics and it comes from three different containers. Customer cares about metrics from only one container and want to exclude other two. All the metrics have a resource attribute container.id and we want to filter the metrics using this field.

Link to tracking Issue:
#2050

Testing:
Unit test added.
Manually tested using logging exporter.

Documentation:
README updated with example.

[codecov]

Codecov Report

Merging #2251 (84f6fd6) into master (28e3cc1) will increase coverage by 0.02%.
The diff coverage is 95.74%.

@@            Coverage Diff             @@
##           master    #2251      +/-   ##
==========================================
+ Coverage   92.00%   92.03%   +0.02%     
==========================================
  Files         273      273              
  Lines       15391    15405      +14     
==========================================
+ Hits        14161    14178      +17     
+ Misses        849      846       -3     
  Partials      381      381              

Impacted Files	Coverage Δ
processor/filterprocessor/filter_processor.go	93.68% <95.12%> (+0.03%)	⬆️
...ternal/processor/filtermatcher/attributematcher.go	100.00% <100.00%> (ø)
internal/processor/filtermatcher/filtermatcher.go	100.00% <100.00%> (ø)
testutil/testutil.go	81.03% <0.00%> (-0.58%)	⬇️
internal/data/spanid.go	100.00% <0.00%> (ø)

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[bogdandrutu]

I am asking for changes because I want to avoid duplicate code.

[hossain-rayhan]

Hi @bogdandrutu, could you have another look on this.

[hossain-rayhan]

Hi @bogdandrutu, I saw that you resolved our improvement conversation, thanks. Is there any other feedback to make it better or we are good to go? Would be great if we can merge it before holidays. 😄

[github-actions]

This PR was marked stale due to lack of activity. It will be closed in 7 days.

[github-actions]

This PR was marked stale due to lack of activity. It will be closed in 7 days.

[hossain-rayhan]

Hi @bogdandrutu, happy new year! would you have a final look on this?