idmapped-mounts: make all tests set their required feature flags

idmapped-mounts: make all tests set their required feature flags

In commit 858a19c5e9b0 ("idmapped_mounts: Prepare for support for more
features") we introduced a flag argument to check for multiple features
and then decide based on the flag argument whether a test requires a
given feature and skip it if the kernel doesn't provide it.

However, not all tests were ported to the new flag argument and still
use the old infrastructure. Port them all.

Fixes: 858a19c5e9b0 ("idmapped_mounts: Prepare for support for more features")
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Zorro Lang <zlang@kernel.org>