Update Feast to support 0.18.x and later

[cbtham]

• Add support for feast 0.18.x and later
  • Updated azure_provider to support new methods in 0.18.x and later
  • Updated mssqlserver to support new methods in 0.18.x and later
• Artificially bump up version of feast-azure-provider
• Added a note section for contributors to build, install and run feast-azure-provider

Note: Latest feast version tested working is 0.18.1