zephyr: Provide slot definitions for three images #1502

Job	Run time
environment (esp32, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secureb...	2m 21s
environment (esp32, serialrecovery)	2m 1s
environment (esp32s2, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 4s
environment (esp32s2, serialrecovery)	1m 43s
environment (esp32s3, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 28s
environment (esp32s3, serialrecovery)	1m 43s
environment (esp32c3, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 30s
environment (esp32c3, serialrecovery)	2m 0s
environment (esp32, multi-image,multi-boot, multi)	1m 48s
environment (esp32s3, multi-image,multi-boot, multi)	1m 47s
	20m 25s

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