soc: nxp: add flashing configuration

- Added a flash runner configuration for rw, mcx, lpc, kinetis and imxrt,
  used for sysbuild multi-image projects like MCUBoot.
- Solved the mass erase issue.
- The sysbuild project "west flash --erase" command caused
  the mass_erase->flash_img1->reset->mass_erase->
  flash_img2->reset sequence.
  It was fixed to the mass_erase->flash_img1->
  flash_img2->reset sequence.

Signed-off-by: Andrej Butok <andrey.butok@nxp.com>