bundle: Normalize paths before bundle root check
bundle: Normalize paths before bundle root check

filepath.Join can return paths with '\' separators. So
when this command is run on Windows the paths are joined
using '\'. But the bundle root check logic assumes the paths
are '/' separated. This change processes the result of filepath.Join
is ensure the path has '/' separators.

Signed-off-by: Ashutosh Narkar <334e9094b46d3151817f829cebfa78d0453b0333@gmail.com>

open-policy-agent/opa,open-policy-agent/opa,open-policy-agent/opa,open-policy-agent/opa,open-policy-agent/opa,open-policy-agent/opa