doc: add prefixes to guide labels

Sphinx labels are global across the documentation.

Rename guide labels with document- or component-specific prefixes
to avoid collisions and make their ownership clear.

Signed-off-by: Nandini Persad <nandinipersad361@gmail.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>
Signed-off-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Chengwen Feng <fengchengwen@huawei.com>