CryptoPkg: Add EC public key PEM test coverage

Add BaseCryptLib unit coverage for EC public key PEM functions:
 - EcGetPublicKeyFromPem
 - EcPublicKeyToPEM

Test size discovery, undersized output buffers, invalid parameters,
and round-trip public key comparison.

Add MockBaseCryptLib support for the new EC public key PEM APIs.

Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
3 files changed