chore: small changes after msfs sdk update

[Saschl]

Summary of Changes

1. Remove custom simvar override for msfs sdk instruments
2. Use GenericDataListener as a more performant way to sync

Screenshots (if necessary)

References

Additional context

Discord username (if different from GitHub):

Testing instructions

1. Check if PFD works normally (no extensive tests needed, just check it turns on and updates)
2. Load a route and verify that all vectors are properly transferred to the ND (== green line shows on ND as expected)

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[frenchairbuspilot]

Discord : jp320#3336
Object of testing: #7962
Tier of Testing : 1
Date : 12/04/2023

Testing Process:
Loaded simbrief for a quick EBBR ELLX, loading went great on nd and mcdu.
all phases of flight as expected on FMA, even with constraints on altitude during arrival.

Negatives:
Only remark is I did not have a TOD arrow nor line in mcdu, i don't know if it's linked to the arrival of what ( LNO3D DICK3C trans in ELLX)

Testing Results:
Passed

[tracernz]

I'd personally think it's not worth fixing up the old sync and instead just switch over to EventBus, but since it's done SGTM.

[Saschl]

I'd personally think it's not worth fixing up the old sync and instead just switch over to EventBus, but since it's done SGTM.

Agreed, but it went faster than expected :D