[FIX] Fix Code Loop in rod of asclepius try_attach_to_owner()

[MiraHell]

What Does This PR Do

Fixes a code loop in the try_attach_to_owner() function of the Rod of Asclepius by adding a check to see if the owner is equal to the thief. Previously, it was called on dropped(), which forced the thief to drop the rod and then it returns to the owner's hand, causing an infinite loop.
Additionally, refactors try_attach_to_owner() to utilize guard clauses.
Fixes #28035

Why It's Good For The Game

Code loops are bad

Testing

Used the rod of asclepius, gave myself advanced kingston disease, changed the disease's stage probability to 50, transformed into Unathi, spawned a human, and set his brute damage to 50. The code did not loop, and the rod still healed the human.

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Declaration

• I confirm that I either do not require pre-approval for this PR, or I have obtained such approval and have included a screenshot to demonstrate this below.

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Changelog

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fix: Fixed code loop when you change your species with rod of asclepius in hand
/:cl: