Remove escrow payment sample

[josh-wong]

Description

This PR removes the escrow payment sample from versions still under Maintenance Support, which is outdated.

Related issues and/or PRs

N/A

Changes made

• Removed the escrow payment sample.
• Replaced the escrow sample on version home pages with the doc for deploying ScalarDL locally on Docker.

Checklist

The following is a best-effort checklist. If any items in this checklist are not applicable to this PR or are dependent on other, unmerged PRs, please still mark the checkboxes after you have read and understood each item.

• I have updated the side navigation as necessary.
• I have commented my code, particularly in hard-to-understand areas. N/A
• I have updated the documentation to reflect the changes.
• Any remaining open issues linked to this PR are documented and up-to-date (Jira, GitHub, etc.). N/A
• My changes generate no new warnings.
• Any dependent changes in other PRs have been merged and published.

Additional notes (optional)

N/A