deploy to upgrade with cooldown and duration

[forcecore]

https://github.com/OpenRA/OpenRA/wiki/Actor-Upgrades

I have looked at upgrades and traits but it seems that I can't have a deploy special ability with cooldown, as in RA3.

What I have in mind is :
DeployToUpgrade:
DeployedUpgrades: invulnerability
Duration: 500
CanDeployOnRamps: yes
ChargeDelay: 1000
self iron curtain ability, which is a Soviet equivalent of self chronoshifting.

• It has to have a Duration, otherwise the unit must "undeploy" to get un-ironcurtained.
• It must have a charge delay, otherwise tanks can permanently re-ironcurtain itself as much as the player wants.

This feature may support many other features such as

• Over-charging tanks so that they may gain rate of fire bonus for a brief moment
• Transform into something for a while
• Self heal rapidly for a few seconds, like Tsunami tanks in RA3

[GraionDilach]

I am okay with anyone shifting https://github.com/GraionDilach/OpenRA.Mods.AS/blob/master/Traits/Conditions/GrantTimedConditionOnDeploy.cs to upstream to fulfill this request. I won't do it myself though.

[GraionDilach]

Note to whoever who would do this c'n'p-styled inclusion - it currently uses GrantConditionToDeploy as it's internal order name because I didn't wanted to duplicate UnitCommandWidget for this, so you have to fix that and include the unique order name in UCW's PerformDeploy list.

That, the change of headers and a short trait summary is all what needs to be done though.

[MustaphaTR]

This i think is also required for Timed Cloak ability of D2K's Ordos Saboteurs.

[abcdefg30]

Should be closed by #20824.