Remove 'Set Up' prefix from sidebar titles across all platforms (#13392)

## DESCRIBE YOUR PR
Removing the setup prefix from the side bar on all platforms in the SDK
docs.

Fixes DOCS-2080

## IS YOUR CHANGE URGENT?  

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- [ ] Urgent deadline (GA date, etc.): <!-- ENTER DATE HERE -->
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- [x ] None: Not urgent, can wait up to 1 week+

## SLA

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Thanks in advance for your help!

## PRE-MERGE CHECKLIST

*Make sure you've checked the following before merging your changes:*

- [ ] Checked Vercel preview for correctness, including links
- [ ] PR was reviewed and approved by any necessary SMEs (subject matter
experts)
- [ ] PR was reviewed and approved by a member of the [Sentry docs
team](https://github.com/orgs/getsentry/teams/docs)

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Co-authored-by: Shannon Anahata <shannonanahata@gmail.com>

Author: sfanahata