net/mlx5: Relax capability check for eswitch query paths

Several eswitch functions that only query other functions' HCA
capabilities or read cached vport state are guarded by the
vhca_resource_manager capability. This capability is required for
set_hca_cap operations but query_hca_cap of other functions only
requires the vport_group_manager capability.

Relax the capability check from vhca_resource_manager to
vport_group_manager in the following query-only paths:
- mlx5_esw_vport_caps_get() - queries other function general caps
- esw_ipsec_vf_query_generic() - queries other function ipsec cap
- mlx5_devlink_port_fn_migratable_get() - reads cached vport state
- mlx5_devlink_port_fn_roce_get() - reads cached vport state
- mlx5_devlink_port_fn_max_io_eqs_get() - queries other function caps
- mlx5_esw_vport_enable/disable() - vhca_id map/unmap

Functions that perform also set_hca_cap (migratable_set, roce_set,
max_io_eqs_set, esw_ipsec_vf_set_generic, esw_ipsec_vf_set_bytype)
retain the vhca_resource_manager requirement.

Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Akiva Goldberger <agoldberger@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260506133239.276237-2-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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