Update min apk version/add more apk version checks

* Minimum version: 2.7.2 (which fixes two CVEs)
* Check the minimum apk version before doing something with apk and
  before entering the chroot manually (previously, it has just checked
  the apk-tools-static version, which gets used to set up the chroot)
* Reword the message for an outdated APK version. Most likely it is
  just the outdated http cache, instead of a man-in-the-middle attack.

See also:
b849b481a0

pmb/parse/arguments.py

@@ -201,7 +201,7 @@ def arguments():
     setattr(args, "arch_native", pmb.parse.arch.alpine_native())
 
     # Add a caching dict
-    setattr(args, "cache", {"apkindex": {}})
+    setattr(args, "cache", {"apkindex": {}, "apk_min_version_checked": []})
 
     # Add and verify the deviceinfo (only after initialization)
     if args.action != "init":