Rework lettuce argument splitter regex (#13736)

Author: laurit

instrumentation/lettuce/lettuce-common/library/src/main/java/io/opentelemetry/instrumentation/lettuce/common/LettuceArgSplitter.java

@@ -14,7 +14,7 @@
 
 public final class LettuceArgSplitter {
   private static final Pattern KEY_PATTERN =
-      Pattern.compile("((key|value)<(?<wrapped>[^>]+)>|(?<plain>[0-9A-Za-z=]+))(\\s+|$)");
+      Pattern.compile("((key|value)<(?<wrapped>.*?)>|(?<plain>\\S++))(?:\\s+|$)");
 
   // this method removes the key|value<...> wrappers around redis keys or values and splits the args
   // string