feat: adding Elastic as a metrics provider

[SandeepD2697]

fixes #3727

Hey @mowies I have taken the code changes from the previous contributors and updated it accordingly by adding it in the provider.go and calling when it is elastic. This is my initial version please have a look and let me know the changes I need to make or any enhancements.

For now the methods purpose are-

GetElasticClient: Creates a new Elasticsearch client.
FetchAnalysisValue: Runs a query to get analysis results and returns the metric value.
EvaluateQuery: Runs a metric query for the last 30 minutes and returns the metric value.
runElasticQuery: Executes a query on Elasticsearch and returns the result.
extractMetric: Gets the metric value from the Elasticsearch result.

[SandeepD2697]

@mowies @odubajDT Can you please have a look at this when you got some time

[codecov]

Codecov Report

Attention: Patch coverage is 49.21875% with 65 lines in your changes missing coverage. Please review.

Project coverage is 77.41%. Comparing base (7eb3337) to head (ed5b994).
Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
...or/controllers/common/providers/elastic/elastic.go	47.45%	61 Missing and 1 partial ⚠️
...-operator/controllers/common/providers/provider.go	70.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3890      +/-   ##
==========================================
- Coverage   77.74%   77.41%   -0.33%     
==========================================
  Files         219      220       +1     
  Lines       11575    11703     +128     
==========================================
+ Hits         8999     9060      +61     
- Misses       2212     2277      +65     
- Partials      364      366       +2     

Files with missing lines	Coverage Δ
...rics-operator/api/v1/keptnmetricsprovider_types.go	65.21% <ø> (ø)
...-operator/controllers/common/providers/provider.go	93.61% <70.00%> (-6.39%)	⬇️
...or/controllers/common/providers/elastic/elastic.go	47.45% <47.45%> (ø)

... and 2 files with indirect coverage changes

Flag	Coverage Δ
certificate-operator	∅ <ø> (∅)
component-tests	∅ <ø> (∅)
lifecycle-operator	∅ <ø> (∅)
metrics-operator	∅ <49.21%> (∅)

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[odubajDT]

Please add the metrics provider also to the helm charts, helm chart tests and docs, as it was done here https://github.com/keptn/lifecycle-toolkit/pull/3361/files

[SandeepD2697]

@odubajDT added elastic as metric provider in helm charts, helm chart tests and docs as suggested

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[odubajDT]

Thank you for your contribution :)

[SandeepD2697]

@mowies @odubajDT there is a small bug replated to this PR with passing provider information. I have addressed in this PR can you please have a look?
#3904