runtests: use deterministic sort for `TESTINFO` lines

Sort TESTINFO lines by description within the number of skipped test.
It makes the list of skipped test groups easier to diff/compare between
jobs and runs.

Closes #15374

diff --git a/tests/runtests.pl b/tests/runtests.pl
index e2b9c0b9d9b2f2e2355620a61bb4317918715184..c02655b07e5d20da92ef5e0047d72167051b248d 100755 (executable)
--- a/tests/runtests.pl
+++ b/tests/runtests.pl
@@ -3147,7 +3147,7 @@ if(%skipped && !$short) {
         $log_line .= ")\n";
         $restraints{$log_line} = $skip_count;
     }
-    foreach my $log_line (sort {$restraints{$b} <=> $restraints{$a}} keys %restraints) {
+    foreach my $log_line (sort {$restraints{$b} <=> $restraints{$a} || uc($a) cmp uc($b)} keys %restraints) {
         logmsg $log_line;
     }
 }