docs: clarify collector deployment patterns

[buyua9]

Fixes #9494.\n\nThis adds a short note under the collector hero image that spells out the two common deployment patterns, so the page no longer reads like a single ambiguous flow.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: buyua9 / name: buyua9 (8008d5b, e02d2cc)

[tiffany76]

Hi @buyua9, you'll need to sign the CLA before we can review this PR. Thanks!

[buyua9]

Hi @buyua9, you'll need to sign the CLA before we can review this PR. Thanks!

I want to be clear about three things:

1. I do agree to sign the CLA for this PR. However, I am currently unable to complete
   the EasyCLA authorization because my GitHub account buyua9 appears to be flagged
   or restricted. If there is any maintainer-side or organization-side way to
   complete, trigger, or bypass this authorization step for this PR, I fully agree to
   that and would be very grateful for the help.
2. If the CLA must still be completed by me directly, the current problem is that my
   GitHub account seems to be flagged, so GitHub is blocking the EasyCLA
   authorization flow. Because of that, I am unable to sign even though I do agree to
   it. Would you please help contact GitHub Support to ask whether the account can be
   unlocked or whether there is another way for me to complete the CLA process?
3. If emailing GitHub Support is the best path, the message could be:

Subject: Request for help with EasyCLA authorization for contributor on open-
telemetry/opentelemetry.io#9602

Hello GitHub Support,

We are trying to help an external contributor complete the CLA process for this pull
request:

#9602

The contributor’s GitHub username is buyua9.

The contributor does agree to sign the CLA, but is currently unable to complete the
EasyCLA authorization flow because the GitHub account appears to be flagged or
restricted. As a result, the contributor cannot finish the CLA step for this pull
request.

If there is any maintainer-side, organization-side, or manual way to complete,
restore, or bypass the EasyCLA authorization for this PR, the contributor explicitly
agrees to that.

If direct completion is not possible, could you please review the account restriction
and help restore the contributor’s ability to authorize EasyCLA, or provide another
way to complete the CLA process?

Thank you very much for your time and help.

Best regards,