bootutil: Add manifest-based loader for Direct XIP #3542

Job	Run time
environment (esp32c3, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 8s
environment (esp32h2, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 10s
environment (esp32s3, serialrecovery)	1m 53s
environment (esp32s2, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 2s
environment (esp32, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secureb...	2m 10s
environment (esp32c2, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 4s
environment (esp32s3, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 6s
environment (esp32h2, serialrecovery)	1m 53s
environment (esp32s2, serialrecovery)	1m 57s
environment (esp32c3, serialrecovery)	1m 52s
environment (esp32, multi-image,multi-boot, multi)	1m 55s
environment (esp32c2, serialrecovery)	1m 44s
environment (esp32c6, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 23s
environment (esp32, serialrecovery)	1m 43s
environment (esp32s3, multi-image,multi-boot, multi)	1m 48s
environment (esp32c6, serialrecovery)	1m 42s
	31m 30s

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