feat: support retry on http status code (#1817)

Co-authored-by: Kent Dong <ch3cho@qq.com>

plugins/wasm-go/extensions/ai-proxy/util/string.go

@@ -1,8 +1,20 @@
 package util
 
+import regexp "github.com/wasilibs/go-re2"
+
 func StripPrefix(s string, prefix string) string {
 	if len(prefix) != 0 && len(s) >= len(prefix) && s[0:len(prefix)] == prefix {
 		return s[len(prefix):]
 	}
 	return s
 }
+
+func MatchStatus(status string, patterns []string) bool {
+	for _, pattern := range patterns {
+		matched, _ := regexp.MatchString(pattern, status)
+		if matched {
+			return true
+		}
+	}
+	return false
+}