Worker Indexing - Move common validation logic into Utility

[surgupta-msft]

What problem would the feature you're requesting solve? Please describe.

Doc (Section - Next Steps, Point h)

Parent Issue - #7496

Describe the solution you'd like

To move common validation logic into Utility -
HostFunctionMetadataProvider, WorkerFunctionMetadataProvider, and FunctionDescriptorProvider all seem to have similar validation logic that is based off each other. To reduce this code duplication, common elements across each of the validation pipelines should be moved to the Utility class. This has the potential to reduce test duplication too.

[Note]: The purpose of the PR is to verify if there is any more common logic to be moved to utility.