GarrisonSpeedBonus & ContainedSpeedBonus restoration

Before release, Age of Mythology had an additional bonus for certain units (likely Siege Towers) that allowed for container units (with GarrisonSpeedBonus) to be faster, essentially functioning like the attack increasing GarrisonBonus but increasing speed instead of attack.

In (at least) The Titans this somewhat functions, but instead will remain still (likely due to a math error) As of AoMEx, this featured seems to have been dummied out entirely.

For AoMR this feature should be restored