update docs for operator-sdk run bundle with SQLite

[everettraven]

Description of the change:

• Add a note in the bundle tutorial about specifying the index image used for handling SQLite bundles in versions of operator-sdk < v1.22.0 as FBC support wasn't enabled until v1.22.0
• Add a FAQ section for the error that may be encountered when using operator-sdk run bundle with operator-sdk versions < v1.22.0

Motivation for the change:

• closes Failed to run bundle: install plan is not available for the subscription #6049

Checklist

If the pull request includes user-facing changes, extra documentation is required:

• Add a new changelog fragment in changelog/fragments (see changelog/fragments/00-template.yaml)
• Add or update relevant sections of the docs website in website/content/en/docs

[michaelryanpeter]

A little less surgical with this review. If this is too heavy-handed, please feel free to take what is useful and disregard the rest.

[michaelryanpeter]

LGTM

[openshift-ci]

@michaelryanpeter: changing LGTM is restricted to collaborators

In response to this:

/lgtm

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[laxmikantbpandhare]

/lgtm