Exclude VertexCacheBenchmark from CI benchmark [CTR]

VertexCacheBenchmark requires too much memory that causes GitHub Actions
to die. This commit excludes it from CI benchmark, but it can still be
run manually.

Signed-off-by: Boxuan Li <liboxuan@connect.hku.hk>

janusgraph-benchmark/src/main/java/org/janusgraph/BenchmarkRunner.java

@@ -99,6 +99,7 @@ public static void main(String[] args) throws RunnerException, IOException, Inte
         } else {
             builder.include(".*Benchmark");
             builder.exclude("StaticArrayEntryListBenchmark");
+            builder.exclude("VertexCacheBenchmark");
             builder.exclude("CQL.*Benchmark");
         }
         Collection<RunResult> results = new Runner(builder.build()).run();