[catalogue + objectstore] Removed the MountPolicy maxDrivesAllowed management and usages

catalogue/Catalogue.hpp

catalogue/CatalogueRetryWrapper.hpp

catalogue/CatalogueTest.cpp

catalogue/CreateMountPolicyAttributes.hpp

catalogue/DummyCatalogue.hpp

catalogue/RdbmsCatalogue.cpp

catalogue/RdbmsCatalogue.hpp

cmdline/CtaAdminCmdParse.hpp

cmdline/CtaAdminTextFormatter.cpp

common/dataStructures/MountPolicy.cpp

common/dataStructures/MountPolicy.hpp

continuousintegration/orchestration/tests/prepare_tests.sh

continuousintegration/orchestration/tests/simpletest.cli.sh

continuousintegration/orchestration/tests/systest.sh

...rchestration/tests/systest_xrdcp_many_concurrent_files.sh

...tegration/orchestration/tests/systest_xrdcp_many_files.sh

objectstore/AlgorithmsTest.cpp

objectstore/ArchiveQueue.cpp

objectstore/ArchiveQueue.hpp

objectstore/ArchiveQueueShard.cpp