Wrong BGM in OG BGM mode near start of game

Note: GIN is intending to check/fix this together with all the question arcs BGM script changes. I'm just recording this so we don't forget it later.

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At the start of tatari, `lsys28` plays.

In "normal BGM/Mangagamer BGM mode, we play: https://www.youtube.com/watch?v=XR2R3eIHbts&t=335s (we don't want to change this - I've just provided it for comparison). This is what Mangagamer provides for `lsys28`

When using the OG BGM, we currently play: https://www.youtube.com/watch?v=DatdHJym3Cg

However, in the original game, the song "LOOP131" plays: https://youtu.be/TT2R86jbw4k&t=602 / https://www.youtube.com/watch?v=bPdUNFWLnzU&t=1587s

A helpful reddit comment pointed me to this:

> It depends on which version you played. The original Japanese version used a short loop called 人食い族 ("Cannibal Tribe", filename "LOOP131.wav") by AIDIA, but the old Mangagamer translation and the post-2019 Steam version each replaced it with tracks of unknown origin, possibly custom-made for those versions.

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We should change either change the OG BGM's `lsys28` to LOOP131, or change the script to play LOOP131 just for this instance, depending on what is more correct.

Also see https://github.com/07th-mod/meakashi/issues/68 "Some BGM/sound effect versions are inconsistent with the question arcs", which I think has been resolved already. Once work starts on BGM stuff, we should make a indexing issue which links to all the other BGM issues.

@GIN5

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Here is the LOOP131.WAV from the original game that we want to include in the mod:
[LOOP131.zip](https://github.com/07th-mod/tatarigoroshi/files/6873221/LOOP131.zip)

Il problema riguarda una specifica traccia BGM (lsys28) che viene riprodotta in modo errato nella modalità OG BGM all'inizio del gioco. La traccia corretta è LOOP131.wav, fornita come allegato zip. Per prima cosa, individua gli script o i file di configurazione BGM che gestiscono il mapping di lsys28 per la modalità OG BGM. Confronta con la modalità BGM normale per comprendere l'attuale configurazione. Quindi, modifica il mapping per lsys28 in LOOP131 o regola lo script per far riprodurre LOOP131 per questa istanza, assicurando la coerenza con il gioco originale. Testa la modifica eseguendo il gioco dall'inizio di tatari per verificare che venga riprodotta la traccia corretta.

Scritto dal modello di indicizzazione a partire dal testo della issue.