security/tpm2-openssl: TPM2 provider for OpenSSL3+

Makes the TPM 2.0 accessible via the standard OpenSSL API and
command-line tools, so one can add TPM support to (almost) any
OpenSSL 3.x based application.

PR 286218
Pull Request: https://github.com/freebsd/freebsd-ports/pull/393
Co-authored-by: Gleb Popov <arrowd@FreeBSD.org>