Add option to lowercase "device" tag

[iliakur]

What does this PR do?

Motivation

On some linux systems the device tag comes in upper case. Our backend keeps the uppercase and adds a lowercase equivalent. Some customers can't use this and also can't rely on device_name. For these customers we add this option.

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.
• 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 90.90909% with 2 lines in your changes missing coverage. Please review.

Project coverage is 88.97%. Comparing base (01712de) to head (6e7ed1a).
Report is 10 commits behind head on master.

Additional details and impacted files

Flag	Coverage Δ
activemq	?
cassandra	?
disk	87.72% <90.90%> (+2.12%)	⬆️
hive	?
hivemq	?
ignite	?
jboss_wildfly	?
kafka	?
presto	?
solr	?

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Review from NouemanKHAL is dismissed.
Related teams and files:

• agent-integrations
  • disk/tests/test_unit.py