Updates to Saci2ToAxiLite

[ruck314]

Description

• Clean up cocotb CI to improve positive test coverage.
• Add support for propagating non-zero AXI-Lite responses to report transaction (TXN) errors to the upstream coordinator.
  • This is implemented by inverting the return OP bit when a non-zero response is detected.
  • The coordinator validates that the returned OP matches the one it sent; a mismatch triggers a memory error that is surfaced to software.

[lorenzrota]

Verified functionality of Saci2 protocol with read/write cfg registers in 3dIntSens-mpw2 repo.