Rename BaseConf.New to BaseConf.Get

Since BaseConf.New could return a cached BaseConf, rather than always
constructing a new struct, I've renamed it to Get to more accurately
reflect its use. A new New() method is called by Get and always
initializes a new struct.

Signed-off-by: Jonathon Anderson <janderson@ciq.co>

internal/pkg/kernel/kernel.go

@@ -28,7 +28,7 @@ var (
 )
 
 func KernelImageTopDir() string {
-	conf := warewulfconf.New()
+	conf := warewulfconf.Get()
 	return path.Join(conf.Paths.WWProvisiondir, "kernel")
 }