Add a FAQ about the ocm-backplane binary

[feichashao]

What type of PR is this?

documentation

What this PR does / Why we need it?

Which Jira/Github issue(s) does this PR fix?

https://issues.redhat.com/browse/OSD-19782

Special notes for your reviewer

Pre-checks (if applicable)

• Ran unit tests locally
• Validated the changes in a cluster
• Included documentation changes with PR

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 44.57%. Comparing base (812bc2f) to head (af5a603).

Additional details and impacted files

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  Coverage   44.57%   44.57%           
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  Files          63       63           
  Lines        5243     5243           
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  Hits         2337     2337           
  Misses       2585     2585           
  Partials      321      321           

[supreeth7]

Nice idea, looking at the adoption of Backplane outside SRE, we really need a dedicated FAQ in the repository.

[feichashao]

@supreeth7 thanks for reviewing and fixing the grammar! I committed changes and squashed.

[supreeth7]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: feichashao, supreeth7

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[openshift-ci]

@feichashao: all tests passed!

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