Allow auras and technologies to modify resource trickle intervals

[Stan]

Reported by Polakrity on ​Phab:D2400 currently one cannot modify resource trickle intervals.

Currently, since the interval value is always read from the template, there is no way to modify it using auras or techs.

One will have to update the GetTimers() function and handle modification changes in OnValueModification

Also since the repeattime in the timer is currently the interval, it might be nice to decouple then, and/or make them both modifiable.

[elexis]

One can modify resource trickles:

ResourceTrickle.prototype.OnValueModification = function(msg)
{
	if (msg.component != "ResourceTrickle")
		return;

	this.ComputeRates();
};

ResourceTrickle.prototype.ComputeRates = function()
{
	this.rates = {};
	for (let resource in this.template.Rates)
		this.rates[resource] = ApplyValueModificationsToEntity("ResourceTrickle/Rates/"+resource, +this.template.Rates[resource], this.entity);
};

From simulation/data/auras/teambonuses/ptol_player_teambonus.json:

	"modifications": [
		{ "value": "ResourceTrickle/Rates/food", "add": 1.0 }
	],

But you mean intervals as noted on IRC.

[Stan]

Actually do it, since I said I would.

[Stan]

In 23879:

Allow the interval to be changed in the templates for the Resource Trickle component.

Reviewed by: @Freagarach
Fixes #5632
Differential Revision: ​https://code.wildfiregames.com/D2794