Use s2n-quic rustls TLS builder instead of re-export

[WesleyRosenblum]

See aws/s2n-quic#2173

The re-exported rustls module in s2n-quic is deprecated as of s2n-quic 1.35.1. This change migrates to using the s2n-quic TLS builder instead, which will ensure the stability of the integration going forward.

To support this migration, we added a couple new capabilities to s2n-quic:

• with_prefer_server_cipher_suite_order added in fix(s2n-quic-rustls): mark re-exported types as deprecated aws/s2n-quic#2176
  • this configures the rustls ignore_client_order setting
• parsing multiple der-encoded certs, added in feat(s2n-quic-rustls): parse multiple der certs aws/s2n-quic#2177

To explain the other changes:

• with_cipher_suites(DEFAULT_CIPHERSUITES), with_safe_default_kx_groups(), and with_safe_default_protocol_versions() are all specified by default in the builder
• session_storage and ticketer were not doing anything in the existing code, as session resumption is not currently supported for rustls in s2n-quic