feat(metrics): Support for external observability providers - Metrics

[roger-zhangg]

Issue number:
2015

Related to PR

PR feat(metrics): support metrics provider #2194

Summary

Add two base classes for supporting customer to bring their own provider class for observability providers
Added a Datadog provider (draft)

Changes

Add two class in metrics/provider
Implemented Datadog provider using the base Metric class.

User experience

UX is not affected for user using cloudwatch emf format.
Customer can now bring their own metric provider to sent metrics to other observability provider

Checklist

If your change doesn't seem to apply, please leave them unchecked.

• Meet tenets criteria
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented
• PR title follows conventional commit semantics

Is this a breaking change?

RFC issue number:

Checklist:

• Migration process documented
• Implement warnings (if it can live side by side)

Acknowledgment

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[roger-zhangg]

Drafted a new metrics provider PR because this approach is much different than the previous provider solution. Will move back to the original PR once details/discussion has settled.
To discuss:

• Is this design accurate based on our previous discussions.
• Is provider doing too little in this new design, how to add more user-value to provider

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -1.32 ⚠️

Comparison is base (8b71185) 97.18% compared to head (de7eb16) 95.87%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2343      +/-   ##
===========================================
- Coverage    97.18%   95.87%   -1.32%     
===========================================
  Files          153      156       +3     
  Lines         7008     7104      +96     
  Branches       514      524      +10     
===========================================
  Hits          6811     6811              
- Misses         156      252      +96     
  Partials        41       41              

Impacted Files	Coverage Δ
aws_lambda_powertools/metrics/provider/__init__.py	0.00% <0.00%> (ø)
aws_lambda_powertools/metrics/provider/base.py	0.00% <0.00%> (ø)
...ertools/metrics/provider/datadog_provider_draft.py	0.00% <0.00%> (ø)

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[roger-zhangg]

Closing this one to use the original PR #2194