v1.2.0: add check_redfish and vCenter tags (Katherine Johnson)

Features:

• adds new source "check_redifish" #91
• sync tags from vcenter #65
• Python virtual environment simplify for Ubuntu by @rsp2k in #103
• add "validate_tls_certs" setting to VMware source #106
• adds option for "vm_tag_relation" #98
• adds "cluster_tenant_relation" and "cluster_tag_relation" to vmware source #110

Bugfixes:

• VLANs that have a / in the name in vmware, are imported with the encoded %2f in the name instead #5
• wrong VLAN assigned when duplicate VLANs exist in same site #40
• fixes same slug name on objects #79 #99
• Skip importing items missing primary key #104
• fixes issue with cloned VMs not synced if same VM uuid exists in different vCenter instances #111

Maintenance

• improvements around class attributes and class creation to avoid circular dependencies #61
• remove 'netbox_host_device_role' and 'netbox_vm_device_role' config options #107
• Switch Docker base image to 'slim-bullseye' #105
• reduce DEBUG and DEBUG2 logging #97

Full Changelog: v1.1.2...v1.2.0