Randomize tts voice more appropriately (#95272)

## About The Pull Request

Adds a helper `SStts.random_tts_voice(gender)` which attempts to pick an
appropriate voice for the passed gender

## Why It's Good For The Game

Randomization into a completely wrong voice kinda ruins it

## Changelog

🆑 Melbert
qol: TTS voice is more appropriately randomized to gender
qol: Getting randomized through means such as mulligan toxin randomizes
TTS voices
/🆑

---------

Co-authored-by: Watermelon914 <37270891+Watermelon914@users.noreply.github.com>

code/modules/client/preferences/voice.dm

@@ -3,6 +3,7 @@
 	savefile_identifier = PREFERENCE_CHARACTER
 	savefile_key = "tts_voice"
 	category = PREFERENCE_CATEGORY_NON_CONTEXTUAL
+	priority = PREFERENCE_PRIORITY_BODY_TYPE
 	should_update_preview = FALSE
 
 /datum/preference/choiced/voice/is_accessible(datum/preferences/preferences)
@@ -23,7 +24,7 @@
 
 /datum/preference/choiced/voice/apply_to_human(mob/living/carbon/human/target, value)
 	if(SStts.tts_enabled && !(value in SStts.available_speakers))
-		value = pick(SStts.available_speakers) // As a failsafe
+		value = SStts.random_tts_voice(target.gender) // As a failsafe
 	target.voice = value
 
 /datum/preference/numeric/tts_voice_pitch