merging from development + fixing linux

Signed-off-by: Esteban Papp <81431996+amznestebanpapp@users.noreply.github.com>

Gems/AWSMetrics/Code/Source/MetricsManager.cpp

@@ -256,7 +256,7 @@ namespace AWSMetrics
                 }
 
                 m_globalStats.m_numSuccesses++;
-                m_globalStats.m_sendSizeInBytes += static_cast<AZStd::atomic<uint32_t>::value_type>(metricsEvent.GetSizeInBytes());
+                m_globalStats.m_sendSizeInBytes += static_cast<uint32_t>(metricsEvent.GetSizeInBytes());
             }
             else
             {

Gems/Vegetation/Code/Source/AreaSystemComponent.cpp

@@ -1010,7 +1010,7 @@ namespace Vegetation
 
         if (m_debugData)
         {
-            m_debugData->m_areaTaskQueueCount.store(static_cast<AZStd::atomic_int::value_type>(m_vegetationThreadTasks.size()), AZStd::memory_order_relaxed);
+            m_debugData->m_areaTaskQueueCount.store(static_cast<int>(m_vegetationThreadTasks.size()), AZStd::memory_order_relaxed);
         }
     }
 
@@ -1025,8 +1025,8 @@ namespace Vegetation
 
             if (m_debugData)
             {
-                m_debugData->m_areaTaskQueueCount.store(static_cast<AZStd::atomic_int::value_type>(m_vegetationThreadTasks.size()), AZStd::memory_order_relaxed);
-                m_debugData->m_areaTaskActiveCount.store(static_cast<AZStd::atomic_int::value_type>(tasks.size()), AZStd::memory_order_relaxed);
+                m_debugData->m_areaTaskQueueCount.store(static_cast<int>(m_vegetationThreadTasks.size()), AZStd::memory_order_relaxed);
+                m_debugData->m_areaTaskActiveCount.store(static_cast<int>(tasks.size()), AZStd::memory_order_relaxed);
             }
         }
 

Gems/Vegetation/Code/Source/InstanceSystemComponent.cpp

@@ -483,7 +483,7 @@ namespace Vegetation
             AZStd::lock_guard<decltype(m_instanceMapMutex)> scopedLock(m_instanceMapMutex);
             AZ_Assert(m_instanceMap.find(instanceData.m_instanceId) == m_instanceMap.end(), "InstanceId %llu is already in use!", instanceData.m_instanceId);
             m_instanceMap[instanceData.m_instanceId] = AZStd::make_pair(instanceData.m_descriptorPtr, opaqueInstanceData);
-            m_instanceCount = static_cast<AZStd::atomic_int::value_type>(m_instanceMap.size());
+            m_instanceCount = static_cast<int>(m_instanceMap.size());
         }
     }
 
@@ -503,7 +503,7 @@ namespace Vegetation
                 opaqueInstanceData = instanceItr->second.second;
                 m_instanceMap.erase(instanceItr);
             }
-            m_instanceCount = static_cast<AZStd::atomic_int::value_type>(m_instanceMap.size());
+            m_instanceCount = static_cast<int>(m_instanceMap.size());
         }
 
         if (opaqueInstanceData)