crypto/tls: add support for RA-TLS 0xFFBB custom extension for SGX attestation#78247

bfoing wants to merge 2 commits intogolang:release-branch.go1.25golang/go:release-branch.go1.25from

Privasys:privasys-ratls-extensionPrivasys/go:privasys-ratls-extensionCopy head branch name to clipboard