feat(jsonrpc): add support for allow-insecure-unlock

[timwhite2]

Description

Closes: #1657.
This pull request is based on #1657.

---

Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.

I have...

• tackled an existing issue or discussed with a team member
• left instructions on how to review the changes
• targeted the correct branch (see PR Targeting)

Reviewers Checklist

All items are required.
Please add a note if the item is not applicable
and please add your handle next to the items reviewed
if you only reviewed selected items.

I have...

• added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• confirmed all author checklist items have been addressed
• confirmed that this PR does not change production code
• reviewed content
• tested instructions (if applicable)
• confirmed all CI checks have passed

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

---

tim seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}