[opentitantool] Consider adding the CRC check back to update-usr-access command

#14877 adds the `update-usr-access` to `opentitantool` and uses it in `bitstream_splice` to improve local workflows that involve splicing a locally built `rom` or `test_rom` into a bitstream from the GCS bucket. See #14865 for details.

One particular shortcoming of the implementation in #14877 is that it disables the CRC check during FPGA programming. We should consider enabling it again.

Start with the update-usr-access implementation from #14877 and its use in bitstream_splice; inspect where FPGA programming disables the CRC check. Done means the command path restores CRC checking while preserving the local rom/test_rom splice workflow.

Written by the indexing model from the issue text.