OpenSSL 3.0 deprecated low-level Elliptic Curve (EC) key manipulation functions (EC_KEY, EC_POINT, EC_GROUP) and direct signature verification functions like ECDSA_do_verify(). This commit modernizes dnssec_ecdsa_verify_raw() by transitioning to the provider-aware EVP API: * Uses OSSL_PARAM arrays and EVP_PKEY_fromdata() to construct the EC public key directly from the raw octet string and curve name, avoiding deprecated EC_POINT parsing. * Converts the raw R and S signature components into a DER-encoded ASN.1 signature using i2d_ECDSA_SIG(), as required by the modern EVP API. * Uses EVP_PKEY_verify() for the actual signature validation. Additionally, this drops an outdated TODO comment waiting for raw ECDSA support in the EVP API, as well as the deprecated warning suppression macros and fallback code blocks. Unit tests for ECDSA are now run unconditionally.
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