extend InterpolationStrategies per provided PV

Now one interpolation strategy is for all PVs. Basically

    def getAligned(
        self,
        PVS: list,
        strategy=LinearInterpolationStrategy,

needs to change to:

    def getAligned(
        self,
        PVS: list,
        strategy=list,

and in the code the default needs to be:

strategy = [LinearInterpolationStrategy for pv in PVS]

and later the per PV calculation needs to by synched with this list

Update of the doc goes without the saying