tests: suit: Fix missing configuration on native_posix

Add the missing CONFIG_PSA_WANT_ALG_ECDSA kconfig.

Signed-off-by: Robert Stypa <[email protected]>

Author: robertstypa

tests/subsys/suit/envelope_decoder/prj.conf

@@ -38,6 +38,8 @@ CONFIG_SUIT_STREAM_SOURCE_CACHE=y
 CONFIG_SUIT_UTILS=y
 CONFIG_SUIT_MEMPTR_STORAGE=y
 
+CONFIG_PSA_WANT_ALG_ECDSA=y
+
 CONFIG_ZCBOR=y
 CONFIG_ZCBOR_CANONICAL=y