Add IRRITANT_IMMUNE to more armors and exoskeletons

[osuphobia]

Summary

Content "Add IRRITANT_IMMUNE to rm13_armor_on phase_immersion_suit and combat exoskeletons"

Purpose of change

#74680 added IRRITANT_IMMUNE flag, but didn't add it to armors that should be capable of preventing skin irritants.

Describe the solution

Add IRRITANT_IMMUNE to rm13_armor_on phase_immersion_suit phase_immersion_suit_on and combat exoskeletons, that are WATERPROOF and RAD_PROOF, thus should be able to prevent skin irritants. As rm13_armor is only RAD_RESIST, leave it as it is.

Describe alternatives you've considered

Also add it to cleansuit and rm13_armor.

Testing

Game loads normally, and wearing rm13_armor_on etc now makes you immune to bile_irritant.

Additional context