Changelog for storage-manager-core

[v3.0.0] 2021-09-10

fix #22164
fix #21980
update gcube-bom version
add close operation on IClient interface
add check on transport layer instance: if the memory type is not the same, a new transportLayer is instatiated
move memoryType var from super class TransportManager
convert BasicDBObject to DBObject the return type used for metadata collections
One pool for every operation: static Operation class; no mongo close operation
upgrade mongo-java-driver to 3.12.0
added input parameter to getSize method in order to be compatible with the needed of s3 client
moved from version 2.13.1 to 3.0.0-SNAPSHOT