Re-enable disabled tests

There's a bunch of tests that are disabled. So far, the following files have disabled tests.

# Outdated tests
- swirlds-virtualmap/src/test/java/com/swirlds/virtualmap/VirtualMapTests.java

# Pending
- swirlds-platform-core/src/test/java/com/swirlds/platform/reconnect/ReconnectTest.java (#5787 )

# Uncategorized
- swirlds-virtualmap/src/test/java/com/swirlds/virtualmap/internal/merkle/VirtualRootNodeTest.java
- swirlds-virtualmap/src/test/java/com/swirlds/virtualmap/internal/hash/VirtualHasherHugeTest.java
- swirlds-virtualmap/src/test/java/com/swirlds/virtualmap/internal/cache/VirtualNodeCacheTest.java
- swirlds-virtualmap/src/test/java/com/swirlds/virtualmap/internal/reconnect/VirtualMapLargeReconnectTest.java
- swirlds-jasperdb/src/test/java/com/swirlds/jasperdb/VirtualDataSourceJasperDBSnapshotMergeTest.java
- swirlds-jasperdb/src/test/java/com/swirlds/jasperdb/files/DataFileCollectionMergeHammerTest.java
- swirlds-unit-tests/common/swirlds-common-test/src/test/java/com/swirlds/common/test/merkle/MerkleSerializationTests.java
- swirlds-unit-tests/common/swirlds-common-test/src/test/java/com/swirlds/common/test/threading/SyncPhaseParallelExecutorTest.java
- swirlds-unit-tests/common/swirlds-common-test/src/test/java/com/swirlds/common/test/metrics/PlatformSpeedometerMetricTest.java
- swirlds-unit-tests/structures/swirlds-fcqueue-test/src/test/java/com/swirlds/fcqueue/test/FCQueueGraphTest.java
- swirlds-unit-tests/core/swirlds-platform-test/src/test/java/com/swirlds/platform/test/sync/SyncTests.java
- swirlds-unit-tests/core/swirlds-platform-test/src/test/java/com/swirlds/platform/test/sync/ShadowGraphTest.java
- swirlds-unit-tests/core/swirlds-platform-test/src/test/java/com/swirlds/platform/test/consensus/ConsensusTests.java
- swirlds-unit-tests/core/swirlds-platform-test/src/test/java/com/swirlds/platform/test/consensus/FastConsensusTests.java

Creating this issue to track efforts to re-enable disabled tests.