fix: incorrect step data received on manager ZMX connection module

• ready signal of M2S TX logic was deasserted too late.
• framing handler did not react properly react on back-pressure.
• Reduced data throughput of Aurora by introducing 1 MHz data strobe for A7 data.

requested review from @cagil.guemues

assigned to @michael.randall

mentioned in commit d619b649

merged