Parachute fixes across several mission + OilRigRangos Update

[TheLocalPub]

Overview

This PR fixes the outstanding missions that use parachutes in preparation for the addition of the new parachute mods which will make them usable once again.
This PR also fixes up OilRigRangos somewhat.

Falcons Flight

• Custom steerable parachutes to Falcons Flights for the NVA.

OilRigRangos

• Adjusted the player count to be slightly smaller by reducing the hostages by three, which is also alot better for ratios.
  Along with this the end conditions have been slightly changed resulting in a simpler Major/Minor win which can be understood better.
• Added steerable parachutes once again now they work.
• Added a drone operator with mavic drones finally (just like the original on Arma 3) - This should make Blufors execution of their plans alot smoother now.
• Added a map marker that actually shows the platform with other markers denoting the stairs and helipad.
• Fixed the helipad taking damage, so should now never be destroyed when landing on it.
• Fixed the pilots and crew mission their gear.
• Fixed a missing prop due to classname change.
• Removed the map markers props display such as water sources, etc, etc.
• Adjusted the briefings.

Grouse Hunt

• No changes - Although I rotated the parachute prop to look better and removed empty slots in the group.