Remove GFE verification from 5 protocol feature flags:   gfe2_reloadable_flag_fix_http2_header_value_validation   gfe2_reloadable_flag_quic_flush_pending_frames_and_padding_bytes_on_migration   gfe2_reloadable_flag_tcp_proxy_dos_allow_non_blocking_actions   gfe2_restart_flag_quic_no_common_cert_set   gfe2_restart_flag_external_dos_for_cloud_tcp_proxy
Remove GFE verification from 5 protocol feature flags:
  gfe2_reloadable_flag_fix_http2_header_value_validation
  gfe2_reloadable_flag_quic_flush_pending_frames_and_padding_bytes_on_migration
  gfe2_reloadable_flag_tcp_proxy_dos_allow_non_blocking_actions
  gfe2_restart_flag_quic_no_common_cert_set
  gfe2_restart_flag_external_dos_for_cloud_tcp_proxy

To be reverted once the protocol freeze ends.

PiperOrigin-RevId: 420750601

google/quiche,google/quiche,google/quiche,google/quiche