Add ECDSA signature support to PSA Crypto backend #1424

Job	Run time
environment (esp32, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secureb...	2m 32s
environment (esp32, serialrecovery)	1m 45s
environment (esp32s2, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 18s
environment (esp32s2, serialrecovery)	2m 21s
environment (esp32s3, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 57s
environment (esp32s3, serialrecovery)	1m 58s
environment (esp32c3, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 11s
environment (esp32c3, serialrecovery)	3m 34s
environment (esp32, multi-image,multi-boot, multi)	2m 23s
environment (esp32s3, multi-image,multi-boot, multi)	1m 53s
	23m 52s

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