Pharma - Change advanced treatments to use Medication function instead of duplicating it

[NikkoJT]

When merged this pull request will:

• Change several advanced treatment functions to use the Medication function, instead of duplicating its code
• Aside from reducing code duplication, this also makes these treatments use the item's displayname for log entries again, instead of using the treatment action's classname. This is better because the displayname is meant to be shown in UI text and the treatment action classname is not (e.g. may contain addon prefixes, cannot contain spaces).
• Note: the Penthrox advanced treatment is basically redundant, because its code is literally just the Medication function, but I didn't outright remove it because that's a bigger change and it may be used for something later.

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