Support custom messages in QueryManager queries of type 'service_check'

[alopezz]

What does this PR do?

Adds a way to dynamically set the message field on queries of service_check type, based on columns from the same query, via str.format-based placeholders. It disables the message (sets it to None) when the reported check status is OK.

Motivation

I'm working on refactoring the Vertica integration to make use of the QueryManager and I need to be able to set the message to avoid a change in behavior.

Additional Notes

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• PR title must be written as a CHANGELOG entry (see why)
• Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• PR must have changelog/ and integration/ labels attached

[codecov]

Codecov Report

Merging #12537 (0a7e979) into master (80c44c4) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Flag	Coverage Δ
activemq_xml	82.31% <ø> (ø)
arangodb	98.21% <ø> (ø)
avi_vantage	91.92% <ø> (ø)
calico	83.33% <ø> (ø)
kube_proxy	100.00% <ø> (ø)
linkerd	85.14% <ø> (+1.14%)	⬆️

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