[BareMetal] Add "Custom Run/Deploy step" for OpenOCD run settings

Now i am working with multicore mpu (stm32mp15x), that hasn't simple method for load cortex-m firmware. The following steps must be completed:
1) Copy firmware to target system
2) Stop cortex-m
3) Set new firmware
4) Start cortex-m core

Steps 1,2 and 3 may be completed as 'build steps', but step 4 must be completed as 'run steps'. BareMetal plugin doesn't allow adding run/deploy steps, i can add "start-step (4)" only as build step. Firmware runs immediately after building!

This problem could be resolved if 'deploy/run' steps wouble be added in "run settings" for baremetal plugin.