Disable Time Port calls when TlmPacketizer is being used

[timcanham]

The FPP autocoder generates Fw.Time calls for components that contain telemetry channels. Then the Fw.Tlm output port is called with the value and the time tag.
Svc/TlmChan puts the telemetry, including the time tag, in a packet and sends it to the ground. The ground software uses the time tag to display the measurement time.
Svc/TlmPacketizer discards the time tag, and puts the telemetry into the destination packet at the specified offset. On each scheduler call, Svc/TlmPacketizer checks each packet to see if there are new updates to any of the channels. If there are, the packet will get a packet-level timestamp.
So, in essence, when Svc/TlmPacketizer is used, all the component time port calls are useless. It would be nice to have a global way to turn off the component time calls so all those CPU cycles are not wasted.

[timcanham]

@bocchino and I talked about options:

1. Have an FPP directive at the project level that causes the autocoder to not generate the call to the time ports in the component.
2. Have TlmChan/TlmPacketizer or other telemetry component add the time stamp, not the components as a permanent change to the autocode. Then TlmPacketizer can skip the call while TlmChan can make it.
3. ?