Add logic to ignore worker versions specified in Hosting config

[surgupta-msft]

Add logic in WorkerConfigurationResolver to ignore worker versions specified in the Hosting config.

This needs some design discussion as there are multiple ways to implement it -

• One setting in Hosting config for all language workers - ["worker-name;version", "worker-name;version"]
  • Pros - Easy to expand for a new language worker
  • Cons - Need to filter out the language of interest
• One setting per language worker -
  • Pros - Easy to get all versions to be ignored per language. No need of filtering like above option.
  • Cons - Multiple settings, and a new setting will be needed for each new language worker.