Add key partition prefix to ScyllaDB schema

[ndr-ds]

Motivation

Proposal

Test Plan

Release Plan

• Nothing to do / These changes follow the usual release cycle.
• These changes should be backported to the latest devnet branch, then
  • be released in a new SDK,
  • be released in a validator hotfix.
• These changes should be backported to the latest testnet branch, then
  • be released in a new SDK,
  • be released in a validator hotfix.
• Backporting is not possible but we may want to deploy a new devnet and release a new
  SDK soon.

Links

• reviewer checklist

[ndr-ds]

• Add key partition prefix to ScyllaDB schema #4021 👈 (View in Graphite)
• Optimize ScyllaDB usage #3985 : 2 other dependent PRs (#4015 , #4047 )
• main

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