Support oneTBB

With the changes in this MR I have been able to run successfully the avalanche scheduler tests that were failing in !1470 (closed) with an older version of TBB (2020.3) and a newer one (oneTBB, 2021.10 which is not from 2021 but was released a few months ago). I also checked that changing the number of threads passed to the AvalancheSchedulerSvc is indeed in effect since it was related to one of the changes when initializing task_arena.

Fixes #270 (closed)

Supersedes !1470 (closed)

GaudiHive/src/ThreadPoolSvc.cpp

@@ -114,7 +114,7 @@ StatusCode ThreadPoolSvc::initPool( const int& poolSize ) {
     Gaudi::Concurrency::ConcurrencyFlags::setNumThreads( m_threadPoolSize );
 
     // Create the task arena to run all algorithms
-    m_arena.initialize(m_threadPoolSize + 1);
+    m_arena.initialize( m_threadPoolSize + 1 );
 
     // Create the barrier for task synchronization at termination
     // (here we increase the number of threads by one to account for calling thread)