Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

BeagleV-Fire uses the PolarFire-Soc IAP feature to reprogram the
SoC-FPGA from Linux. The IAP mode used only actually programs the device
if the Libero design version is different from the one in the currently
programmed FPGA design.
This change to the gateware builder uses the gateware repo's git hash to
generate a Libero design version number which will be different with each
push to a forked gateware repository. This results in the bitstream
generated by the CI to successfully reprogram the SoC-FPGA after each
change to the gateware source code.

Set CI tag to libero-soc-v2023.2 to execute CI on gitlab runners using version
2023.2 of Libero.

Correct the location of the gateware source code in the script that
generates the device tree overlay for the gateware.

The build configuration YAML files describing a custom gateware
configuration will be used by the CI system generate bitstreams for user
custom FPGA designs.

First argument removed from gateware-builds-tester script.

The intention is to replace GATEWARE_GIT_VERSION within the "chosen" section
of the device tree overlay with git hash/branch/tag gateware
repository information to help identify the gateware version at
run time.

Allow the control of M2_UART_RTS and M2_UART_CTS from the CorePGIO
instance used for board tests of the M.2 connector.