boot: zephyr: Fix sample.bootloader.mcuboot.usb_cdc_acm_recovery

Adds missing usb_cdc_acm_recovery.conf configuration file
for the sample.bootloader.mcuboot.usb_cdc_acm_recovery test case.

Signed-off-by: Andrej Butok <andrey.butok@nxp.com>
(cherry picked from commit 742978e7)