Adds a before and after loc comparsion to picking up dropship equipment.

[TheGamerdk]

About the pull request

Should fix #5848

Explain why it's good for the game

Testing Photographs and Procedure

Screenshots & Videos

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Changelog

🆑
fix: Should no longer be possible to pick up the same dropship equiment with 2 different powerloaders
/:cl:

[SabreML]

Could you also add a similar check to /obj/vehicle/multitile/proc/uninstall_hardpoint()?
That seems to be the only other 'picking something up with a powerloader' proc that could end up having the same problem.

[github-actions]

This PR has been inactive for long enough to be automatically marked as stale. This means it is at risk of being auto closed in ~ 7 days, please address any outstanding review items and ensure your PR is finished, if these are all true and you are auto-staled anyway, you need to actively ask maintainers if your PR will be merged. Once you have done any of the previous actions then you should request a maintainer remove the stale label on your PR, to reset the stale timer. If you feel no maintainer will respond in that time, you may wish to close this PR youself, while you seek maintainer comment, as you will then be able to reopen the PR yourself