TEST-58-REPART: use $ID_LIKE to check the os is Alpine or Nura

All other places use $ID_LIKE to detect Alpine/Nura.

(cherry picked from commit 0640dd91fca4f05ebfc22dcfb71c08cb5ef43c68)

test/units/TEST-58-REPART.sh

@@ -1599,8 +1599,8 @@ EOF
 testcase_verity_encrypt() {
     local defs imgs output loop drh hrh part_size dm_devno verity_dep
 
-    if ( . /etc/os-release && [[ "$ID" == "postmarketos" ]] ); then
-        echo "Skipping verity+encrypt test on postmarketOS."
+    if ( . /etc/os-release && [[ "${ID_LIKE:-}" == "alpine" ]] ); then
+        echo "Skipping verity+encrypt test on Alpine/Nura."
         return
     fi