nuttx: add support for swap without scratch area #1369

Job	Run time
environment (esp32, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secureb...	3m 22s
environment (esp32, serialrecovery)	3m 26s
environment (esp32s2, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	3m 54s
environment (esp32s2, serialrecovery)	2m 52s
environment (esp32s3, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	3m 44s
environment (esp32s3, serialrecovery)	3m 17s
environment (esp32c3, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	4m 17s
environment (esp32c3, serialrecovery)	3m 22s
environment (esp32, multi-image,multi-boot, multi)	3m 30s
environment (esp32s3, multi-image,multi-boot, multi)	3m 47s
	35m 31s

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