fix: Fix PV grow_to_fill feature

We need to set the `grow_to_fill` property on the LVMPV format not
on the block device and the target size for the resize needs to be
size of the PV, 'self._device' is the pool (VG) in this case.

Related: storaged-project/blivet#1320

Resolves: RHEL-73244

Author: vojtechtrefny

library/blivet.py

@@ -1853,8 +1853,8 @@ def _manage_members(self):
                 pv.format.update_size_info()  # set pv to be resizable
 
                 if pv.format.resizable:
-                    pv.grow_to_fill = True
-                    ac = ActionResizeFormat(pv, self._device.size)
+                    pv.format.grow_to_fill = True
+                    ac = ActionResizeFormat(pv, pv.size)
                     self._blivet.devicetree.actions.add(ac)
                 else:
                     log.warning("cannot grow/resize PV '%s', format is not resizable", pv.name)

tests/verify-pool-member-pvsize.yml

@@ -11,10 +11,9 @@
 
 - name: Verify each PV size
   assert:
-    that: (dev_size.bytes - actual_pv_size.stdout | int) |
-      abs / actual_pv_size.stdout | int < 0.04
+    that: (dev_size.bytes - actual_pv_size.stdout | int) <= 4194304
     msg: >-
-      PV resize failure; size difference too big
+      Unexpected difference between PV size and block device size:
       (device size: {{ dev_size.bytes }})
       (actual PV size: {{ actual_pv_size.stdout }})