Fix performer compilation on transactionsThreshold

This was only added in 3.4.0, it needs to be behind a tag.

Change-Id: I6d0258c3b6de055ac5414f5119615334176288d4
Reviewed-on: https://review.couchbase.org/c/couchbase-jvm-clients/+/180949
Reviewed-by: Graham Pople <[email protected]>
Tested-by: Build Bot <[email protected]>

Author: programmatix

java-fit-performer/src/main/java/com/couchbase/utils/OptionsUtil.java

@@ -355,9 +355,11 @@ private static void applyObservabilityConfig(ClusterEnvironment.Builder clusterE
             if (tlc.hasAnalyticsThresholdMillis()) {
                 builder.analyticsThreshold(Duration.ofMillis(tlc.getAnalyticsThresholdMillis()));
             }
+            // [start:3.4.0]
             if (tlc.hasTransactionsThresholdMillis()) {
                 builder.transactionsThreshold(Duration.ofMillis(tlc.getTransactionsThresholdMillis()));
             }
+            // [end:3.4.0]
             if (tlc.hasSampleSize()) {
                 builder.sampleSize(tlc.getSampleSize());
             }