Change the D2k ornithopter strike to match the original

[penev92]

Currently the Ornithopter airstrike works identically to the TD A10 strike and the RA Badger bomber strike.
D2k Ornithopters should use a different (line) formation and do 3 attack runs over the target location in a very particular way, before leaving the map in a straight line.
Examples can be seen here:

• https://youtu.be/dmflM70vtZI?t=36
• https://youtu.be/_t3Tuuoy_P4?t=577
• https://youtu.be/_t3Tuuoy_P4?t=3335
• https://gfycat.com/firmbetterkite

They all result in the same bombing pattern, rotated depending on where the Ornithopters spawn from - pattern here.

Information on my findings and discussions can be found in #17827.
The current plan, as discussed in Discord, is to have a series of PR fix this:

• Step 1 - improve squadron configurability for the AirstrikePower to allow for switching to a "line" formation for the ornithopters. [Add configurable squadrons to AirstrikePower #18007]
• Step 2 - improve AttackBomber as discussed on Discord and create a new D2kAirstringPower/AttackOrnithopter trait to inherit from that and hardcode the required flight path.
• Step 3 - Adjust the map entry and exit paths.