Improve self-host production checklist

[udf2457]

Temporal Affiliation

• I am a Temporal employee

Content Suggestion

Currently /self-hosted-guide/production-checklist is:

1. A whole page written in a negative tone about why the reader should not self-host Temporal
2. A whole page of repeated in-your-face marketing for Temporal commercial services ("Temporal Cloud provides...", "Temporal Cloud is available..." , "With Temporal Cloud..." etc. etc.)

You really should be starting from the premise that if somebody is reading the self-hosted-guide section of the docs that they:

1. Want to self-host
2. Want some useful, actionable information

In a section entitled Production Checklist I think it is only fair and reasonable that the reader expects a page that:

1. documents current Production Best-Practices
2. highlights useful configuration parameters
3. documents common approaches to solve common problems

Frankly, at the moment this page simply reads more like a Temporal Sales Rep's "Talking Points" cheat-sheet than a useful page in technical documentation.