Add timers for bulk api's

[kusumachalasani]

Description

Include timers to measure the timetaken for bulk api. This includes to measure the time taken

• to gather metadata.
• to create an experiment
• to generate a recommendation
• to run the complete job.
• to retrieve job status when calling the api /bulk?job=<>
• to create a bulk job when calling api /bulk

Fixes # (issue)

Type of change

• Bug fix
• [ X] New feature
• Docs update
• Breaking change (What changes might users need to make in their application due to this PR?)
• Requires DB changes

How has this been tested?

Ran the bulk kruize demos to ensure the metrics are updated as expected. Also, included some manual bulk calls along with demo to ensure the metrics are updated proly with multiple bulk jobs.

• New Test X
• Functional testsuite

Test Configuration

• Kubernetes clusters tested on:
  openshift

Checklist 🎯

• Followed coding guidelines
• Comments added
• Dependent changes merged
• Documentation updated
• Tests added or updated

Additional information

Include any additional information such as links, test results, screenshots here

[kusumachalasani]

Metrics added are:

## Metrics for importMetadata
kruizeAPI_count{api="datasources",application="Kruize",method="importMetadata",status="success",} 1.0
kruizeAPI_sum{api="datasources",application="Kruize",method="importMetadata",status="success",} 6.055581306

## Metrics for bulk api 
kruizeAPI_count{api="bulk",application="Kruize",method="createBulkJob",status="success",} 1.0
kruizeAPI_count{api="bulk",application="Kruize",method="jobStatus",status="success",} 319.0
kruizeAPI_count{api="bulk",application="Kruize",method="getExperimentMap",status="success",} 1.0
kruizeAPI_count{api="bulk",application="Kruize",method="runBulkJob",status="success",} 1.0

kruizeAPI_sum{api="bulk",application="Kruize",method="createBulkJob",status="success",} 0.021006902
kruizeAPI_sum{api="bulk",application="Kruize",method="jobStatus",status="success",} 16.427286459
kruizeAPI_sum{api="bulk",application="Kruize",method="getExperimentMap",status="success",} 0.490153543
kruizeAPI_sum{api="bulk",application="Kruize",method="runBulkJob",status="success",} 3768.895746419

kruizeAPI_active_jobs_count{api="bulk",application="Kruize",method="runBulkJob",status="running",} 0.0

[dinogun]

@kusumachalasani Please fix the conflict

[kusumachalasani]

@kusumachalasani Please fix the conflict

Done.

[dinogun]

LGTM