Fix AWK regex syntax error in exitrace

- Fix unterminated regexp in deferred detection
- Simplify regex pattern for 'all hosts failing' detection
- Removes problematic single quote escaping in AWK

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

legacy/exitrace/exitrace.sh

@@ -419,7 +419,7 @@ BEGIN { FS=" " }
 
   # Deferred detection
   is_defer = 0
-  if (is_remote && (index($0, "retry time not reached")>0 || index($0, "temporar")>0 || index($0, "timed out")>0 || match($0, /all hosts for '\''[^']+'\'' have been failing/))) {
+  if (is_remote && (index($0, "retry time not reached")>0 || index($0, "temporar")>0 || index($0, "timed out")>0 || match($0, /all hosts for.*have been failing/))) {
     is_defer=1
   }
 
@@ -437,7 +437,7 @@ BEGIN { FS=" " }
   if (is_perm_fail) fails[msgid]++
 
   # Fail marker
-  if (match($0, /all hosts for '\''[^']+'\'' have been failing/)) {
+  if (match($0, /all hosts for.*have been failing/)) {
     fail_marker[msgid]=1
   }