testsuite/pka: add rust-crypto p256 for comparison

Author: newAM

Cargo.lock

@@ -85,10 +85,12 @@ cortex-m-rt = "0.7"
 defmt = "0.3"
 defmt-rtt = "0.3"
 defmt-test = "0.3"
+ecdsa = { version = "0.14", default-features = false, features = ["arithmetic", "hazmat"] }
 embedded-time = "0.12"
 hex-literal = "0.3"
 itertools = { version = "0.10", default-features = false }
 nb = "1"
+p256 = { version = "0.11", default-features = false, features = ["arithmetic", "ecdsa"] }
 panic-probe = { version = "0.3", features = ["print-defmt" ] }
 rand = { version = "0.8", default-features = false }
 rand_chacha = { version = "0.3", default-features = false }