Fixes #11443 - Adds check to AcceptanceController to see if signatures are enabled

[mikeroq]

Description

Fixes #11443. Just adds a check to the require_accept_signature setting and moves the signature processing into there.

Type of change

Please delete options that are not relevant.

• [ x] Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test A
• Test B

Test Configuration:

• PHP version: 8.1.5
• MySQL version 8.0.29
• Webserver version Apache 2.4.41
• OS version Ubuntu 20.04.4

Checklist:

• [x ] I have read the Contributing documentation available here: https://snipe-it.readme.io/docs/contributing-overview
• [ x] I have formatted this PR according to the project guidelines: https://snipe-it.readme.io/docs/contributing-overview#pull-request-guidelines
• [x ] My code follows the style guidelines of this project
• [ x] I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• [x ] My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[snipe]

This looks great - can you just back out that change to version.php?

[mikeroq]

Ok I think I got it. Excuse my noobiness!

[snipe]

Now there is a merge conflict? What the hell? I haven't pushed anything up

[mikeroq]

Could have been me! I had to google about how to remove those commits :(

[snipe]

I made a clean version here - can you take a look and make sure it does what you're looking for? #11445

[snipe]

Sorry this PR got wonky - you did the work and I'd have preferred you get the credit for it :(