util/chroot: rename context class to ChrootProcDevSys

Rename the context class to better describe what it's doing.  It doesn't
run anything in a chroot, but it prepares the tree for it.

osbuild/util/chroot.py

@@ -2,7 +2,7 @@ import os
 import subprocess
 
 
-class Chroot:
+class ChrootProcDevSys:
     """
     Sets up mounts for the virtual filesystems inside a root tree, preparing it for running commands using chroot. This
     should be used whenever a stage needs to run a command against the root tree but doesn't support a --root option or

stages/org.osbuild.dracut

@@ -3,7 +3,7 @@ import subprocess
 import sys
 
 import osbuild.api
-from osbuild.util.chroot import Chroot
+from osbuild.util.chroot import ChrootProcDevSys
 
 
 def yesno(name: str, value: bool) -> str:
@@ -83,7 +83,7 @@ def main(tree, options):
         if initoverlayfs:
             initfs_bin = "/usr/bin/initoverlayfs-install"
 
-        with Chroot(tree):
+        with ChrootProcDevSys(tree):
             subprocess.run(["/usr/sbin/chroot", tree, initfs_bin,
                             "--no-hostonly",
                             "--kver", kver]

stages/org.osbuild.update-crypto-policies

@@ -3,13 +3,13 @@ import subprocess
 import sys
 
 from osbuild import api
-from osbuild.util.chroot import Chroot
+from osbuild.util.chroot import ChrootProcDevSys
 
 
 def main(tree, options):
     policy = options["policy"]
 
-    with Chroot(tree):
+    with ChrootProcDevSys(tree):
         # update-crypto-polciies uses /proc/self/mountinfo to find and verify that fips paths have been mounted to their
         # expected locations by searching for the following path suffixes:
         #   /crypto-policies/default-fips-config