Select all ClusterTrustBundles that match this label selector.
Only has effect if signerName is set.
Mutually-exclusive with name.
If unset, interpreted as "match nothing".
If set but empty, interpreted as "match everything".
If true, don't block pod startup if the referenced ClusterTrustBundle(s) aren't available.
If using name, then the named ClusterTrustBundle is allowed not to exist.
If using signerName, then the combination of signerName and labelSelector is allowed to match zero ClusterTrustBundles.
ClusterTrustBundleProjection describes how to select a set of ClusterTrustBundle objects and project their contents into the pod filesystem.