V3.7.0 streamtx evr

[thatweaver]

Description

• Modify TimingStreamTx to be consistent with EVG output. EVRs can tell the difference
• Add AC sampling configuration registers

Note

It affects the timing stream simulation (for transmit). The timing receiver logic does NOT change. The impact is on the EVRs only, since they are the only receivers that consume the old data buffer stream of LCLS-I timing.

[ruck314]

@thatweaver Approved. Please merge when you are ready