feat: Integrating ELK provider

[Bharadwajshivam28]

Fixes #3727

Description

I have started creating custom KeptnMetricsProvider for Elastic and now I have integrated some methods.

For now the methods purpose are-

• NewElasticProvider: Creates a new KeptnElasticProvider with an 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.

[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 SonarCloud