fix(ext/crypto): remove EdDSA alg key checks and export (#20331)

As per WICG/webcrypto-secure-curves#24 this
removes the check for Ed25519 JWK `alg` during importKey and removes the
`alg` for Ed25519 keys during JWK exportKey.

ext/crypto/00_crypto.js

@@ -2273,18 +2273,13 @@ function importKeyEd25519(
  }
 
  // 5.
- if (jwk.alg !== undefined && jwk.alg !== "EdDSA") {
- throw new DOMException("Invalid algorithm", "DataError");
- }
-
- // 6.
  if (
  keyUsages.length > 0 && jwk.use !== undefined && jwk.use !== "sig"
  ) {
  throw new DOMException("Invalid key usage", "DataError");
  }
 
- // 7.
+ // 6.
  if (jwk.key_ops !== undefined) {
  if (
  ArrayPrototypeFind(
@@ -2311,12 +2306,12 @@ function importKeyEd25519(
  }
  }
 
- // 8.
+ // 7.
  if (jwk.ext !== undefined && jwk.ext === false && extractable) {
  throw new DOMException("Invalid key extractability", "DataError");
  }
 
- // 9.
+ // 8.
  if (jwk.d !== undefined) {
  // https://www.rfc-editor.org/rfc/rfc8037#section-2
  let privateKeyData;
@@ -4089,7 +4084,6 @@ function exportKeyEd25519(format, key, innerKey) {
  : ops.op_crypto_base64url_encode(innerKey);
  const jwk = {
  kty: "OKP",
- alg: "EdDSA",
  crv: "Ed25519",
  x,
  "key_ops": key.usages,