Propagate agent host tags for sqlserver

[natashadada]

What does this PR do?

In #18269 and DataDog/datadog-agent#28027, I added functions to get the host tags of the agent host. This PR updates the agent host tags that we use in the sqlserver integration. This change only affects customers with the propagate_agent_tags flag set to true. By calling get_agent_host_tags, we not only use the tags in the conf.yaml file but also other tags on the agent host.

Motivation

Metrics emitted by DBM integrations (postgres, sql server, and mysql) are tagged with the tags from the database instance host. We would like to update the propagate_agent_tags option (default false) that allows us to also consider the tags of the agent host. If this setting is enabled, we will propagate all agent host tags. This allows user to opt-in to having their postgres metrics tagged with the agent host tags.

Additional Notes

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Changelog entries must be created for modifications to shipped code
• Add the qa/skip-qa label if the PR doesn't need to be tested during QA.
• If you need to backport this PR to another branch, you can add the backport/<branch-name> label to the PR and it will automatically open a backport PR once this one is merged

[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 5 lines in your changes missing coverage. Please review.

Project coverage is 86.89%. Comparing base (fcbaaa1) to head (0126582).
Report is 3 commits behind head on master.

Additional details and impacted files

Flag	Coverage Δ
activemq	?
cassandra	?
hive	?
hivemq	?
hudi	?
ignite	?
jboss_wildfly	?
kafka	?
presto	?
solr	?
sqlserver	84.80% <90.00%> (+4.98%)	⬆️

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