[mongo] allow customizable collection interval for collection and sharded data distribution metrics

[lu-zhengda]

What does this PR do?

This PR introduces a new configuration option, metrics_collection_interval, which allows users to customize the collection interval for collection statistics, index statistics, and sharded data distribution metrics.

Motivation

The $collStats, $indexStats, and $shardedDataDistribution aggregation pipelines can be resource-intensive for large databases. Allowing users to adjust the collection frequency provides flexibility to minimize the integration's performance impact while still gathering important metrics.

https://datadoghq.atlassian.net/browse/DBMON-4786

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Add the qa/skip-qa label if the PR doesn't need to be tested during QA.
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.03%. Comparing base (7b18212) to head (8f66b8f).
Report is 14 commits behind head on master.

Additional details and impacted files

Flag	Coverage Δ
activemq	?
cassandra	?
hive	?
hivemq	?
hudi	?
ignite	?
jboss_wildfly	?
kafka	?
mongo	93.13% <100.00%> (-0.46%)	⬇️
presto	?
solr	?

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