Adjust pgAdmin version comparision logic

Now that the current version of pgAdmin is greater than 9.9, the
version comparison logic has to be updated to properly compare the
values (i.e. we can no longer use a simple x < y to compare floats).

This update makes the necessary adjustments so our code works as
expected for newer versions of pgAdmin.

Issue: PGO-2838

Author: tjmoore4

internal/controller/standalone_pgadmin/users.go

@@ -178,11 +178,19 @@ cd $PGADMIN_DIR
 	}
 
 	var olderThan9_3 bool
-	versionFloat, err := strconv.ParseFloat(pgadmin.Status.MinorVersion, 64)
-	if err != nil {
-		return err
+
+	// Validate the pgAdmin minor version is in the format "X.Y"
+	parts := strings.Split(pgadmin.Status.MinorVersion, ".")
+	if len(parts) != 2 {
+		return errors.New("invalid pgAdmin minor version: " + pgadmin.Status.MinorVersion)
 	}
-	if versionFloat < 9.3 {
+
+	// Parse the major and minor versions
+	major, _ := strconv.Atoi(parts[0])
+	minor, _ := strconv.Atoi(parts[1])
+
+	// Check if the pgAdmin version is older than 9.3
+	if major < 9 || (major == 9 && minor < 3) {
 		olderThan9_3 = true
 	}