core: replace secp256k with k256 in crypto::ecdsa (#3525)

This PR replaces the usage of
[secp256k](https://crates.io/crates/secp256k1) crate with
[k256](https://crates.io/crates/k256) in `core::crypto::ecdsa` for
`non-std` environments as outcome of discussion in #3448.

`secp256k1` is used in `std`, meaning that we should not affect host
performance with this PR.
`k256` is enabled in runtimes (`no-std`), and is required to proceed
with #2044.

If desirable, in future we can switch to `k256` also for `std`. That
would require some performance evaluation (e.g. for EVM chains as per
https://github.com/paritytech/polkadot-sdk/issues/3448#issuecomment-1976780391).

Closes https://github.com/paritytech/polkadot-sdk/issues/3448

---------

Co-authored-by: command-bot <>
Co-authored-by: Davide Galassi <davxy@datawok.net>

Cargo.lock

@@ -4815,6 +4815,7 @@ dependencies = [
  "digest 0.10.7",
  "elliptic-curve",
  "rfc6979",
+ "serdect",
  "signature",
  "spki",
 ]
@@ -4881,9 +4882,9 @@ checksum = "a26ae43d7bcc3b814de94796a5e736d4029efb0ee900c12e2d54c993ad1a1e07"
 
 [[package]]
 name = "elliptic-curve"
-version = "0.13.5"
+version = "0.13.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "968405c8fdc9b3bf4df0a6638858cc0b52462836ab6b1c87377785dd09cf1c0b"
+checksum = "b5e6043086bf7973472e0c7dff2142ea0b680d30e18d9cc40f267efbf222bd47"
 dependencies = [
  "base16ct",
  "crypto-bigint",
@@ -4894,6 +4895,7 @@ dependencies = [
  "pkcs8",
  "rand_core 0.6.4",
  "sec1",
+ "serdect",
  "subtle 2.5.0",
  "zeroize",
 ]
@@ -6971,14 +6973,15 @@ dependencies = [
 
 [[package]]
 name = "k256"
-version = "0.13.1"
+version = "0.13.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cadb76004ed8e97623117f3df85b17aaa6626ab0b0831e6573f104df16cd1bcc"
+checksum = "956ff9b67e26e1a6a866cb758f12c6f8746208489e3e4a4b5580802f2f0a587b"
 dependencies = [
  "cfg-if",
  "ecdsa",
  "elliptic-curve",
  "once_cell",
+ "serdect",
  "sha2 0.10.7",
 ]
 
@@ -17101,6 +17104,7 @@ dependencies = [
  "der",
  "generic-array 0.14.7",
  "pkcs8",
+ "serdect",
  "subtle 2.5.0",
  "zeroize",
 ]
@@ -17359,6 +17363,16 @@ dependencies = [
  "unsafe-libyaml",
 ]
 
+[[package]]
+name = "serdect"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a84f14a19e9a014bb9f4512488d9829a68e04ecabffb0f9904cd1ace94598177"
+dependencies = [
+ "base16ct",
+ "serde",
+]
+
 [[package]]
 name = "serial_test"
 version = "2.0.0"
@@ -18567,6 +18581,7 @@ dependencies = [
  "hash256-std-hasher",
  "impl-serde",
  "itertools 0.10.5",
+ "k256",
  "lazy_static",
  "libsecp256k1",
  "log",
@@ -22553,9 +22568,9 @@ dependencies = [
 
 [[package]]
 name = "zeroize"
-version = "1.6.0"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2a0956f1ba7c7909bfb66c2e9e4124ab6f6482560f6628b5aaeba39207c9aad9"
+checksum = "525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d"
 dependencies = [
  "zeroize_derive",
 ]