Inspect telemetry to analyze if configuration section is used

Below log is added to analyze if this configuration section is added by any scenario/component. If it is not being used, we can cleanup the code using this config section - [Link](https://github.com/Azure/azure-functions-host/blob/dev/src/WebJobs.Script/Workers/Rpc/Configuration/RpcWorkerConfigFactory.cs#L51-L57). We can cleanup this telemetry too once we have enough information regarding this.

config section: `{RpcWorkerConstants.LanguageWorkersSectionName}:{WorkerConstants.WorkersDirectorySectionName}`

(below code is no in dev branch yet. Will update the link pointing to dev branch as soon as PR is merged).

https://github.com/Azure/azure-functions-host/blob/0ee087135d89bde55c04640498862f2ba07ce21e/src/WebJobs.Script/Workers/Rpc/Configuration/WorkerConfigurationResolverOptionsSetup.cs#L96

Start with RpcWorkerConfigFactory.cs lines 51-57 and WorkerConfigurationResolverOptionsSetup.cs line 96. Inspect the telemetry for RpcWorkerConstants.LanguageWorkersSectionName:WorkerConstants.WorkersDirectorySectionName and determine whether any scenario or component uses it. Done means documenting the usage finding and, if unused, identifying the related configuration code and telemetry for cleanup.

Written by the indexing model from the issue text.