fwctl/mlx5: Add Adjacent function query commands and their scope

fwctl/mlx5: Add Adjacent function query commands and their scope

MLX5_CMD_OP_QUERY_ADJACENT_FUNCTIONS_ID:
 - Query Adjacent functions (PFs/VFs) of the function calling FW.

MLX5_CMD_OP_DELEGATE_VHCA_MANAGEMENT:
 - Delegates own VFs to be managed/seen by other adjacent PFs

MLX5_CMD_OP_QUERY_DELEGATED_VHCA:
 - Query current function delegation state.

Link: https://patch.msgid.link/r/20250908165256.1255985-3-saeed@kernel.org
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>