FoundationDB metrics for backup, DR and more

[jamesreprise]

What does this PR do?

Add FoundationDB metrics for:

• Backup
• Disaster Recovery
• Process:
  • RSS of memory
  • Role count

Also adds a tag for the class type of the process.

Motivation

Desire for additional metrics covering backup, DR and etc.

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[bot]]

Codecov Report

:x: Patch coverage is 18.18182% with 18 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 88.60%. Comparing base (9f203c5) to head (0430958). :warning: Report is 1192 commits behind head on master.

:x: Your project check has failed because the head coverage (73.51%) is below the target coverage (75.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

Flag	Coverage Δ
activemq	?
cassandra	?
foundationdb	73.51% <18.18%> (-8.95%)	:arrow_down:
hive	?
hivemq	?
ignite	?
jboss_wildfly	?
kafka	?
presto	?
solr	?

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