SFI: ROPC - Fix up WCF docs

[gewarren]

Contributes to #41954.

(Hide whitespace changes.)

• Removes connection strings where not needed.
• Adds note about using managed identities where appropriate.
• Delete ms.assetid metadata.
• Improves descriptions to placate Learn Linter.
• Fix headings by using sentence case and replacing gerunds.

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docs/framework/migration-guide/mitigation-pool-blocking-period.md	docs/framework/migration-guide/mitigation-pool-blocking-period
docs/framework/wcf/feature-details/caching-support-for-wcf-web-http-services.md	docs/framework/wcf/feature-details/caching-support-for-wcf-web-http-services
docs/framework/wcf/feature-details/creating-a-long-running-workflow-service.md	docs/framework/wcf/feature-details/creating-a-long-running-workflow-service
docs/framework/wcf/feature-details/how-to-configure-persistence-with-workflowservicehost.md	docs/framework/wcf/feature-details/how-to-configure-persistence-with-workflowservicehost
docs/framework/wcf/feature-details/how-to-use-the-aspnet-authorization-manager-role-provider-with-a-service.md	docs/framework/wcf/feature-details/how-to-use-the-aspnet-authorization-manager-role-provider-with-a-service
docs/framework/wcf/feature-details/how-to-use-the-aspnet-membership-provider.md	docs/framework/wcf/feature-details/how-to-use-the-aspnet-membership-provider
docs/framework/wcf/feature-details/how-to-use-the-aspnet-role-provider-with-a-service.md	docs/framework/wcf/feature-details/how-to-use-the-aspnet-role-provider-with-a-service
docs/framework/wcf/feature-details/message-security-with-mutual-certificates.md	docs/framework/wcf/feature-details/message-security-with-mutual-certificates
docs/framework/wcf/feature-details/security-behaviors-in-wcf.md	docs/framework/wcf/feature-details/security-behaviors-in-wcf
docs/framework/wcf/samples/durable-instance-context.md	docs/framework/wcf/samples/durable-instance-context
docs/framework/wcf/samples/membership-and-role-provider.md	docs/framework/wcf/samples/membership-and-role-provider
docs/framework/wcf/samples/service-transaction-behavior.md	docs/framework/wcf/samples/service-transaction-behavior
docs/framework/whats-new/index.md	docs/framework/whats-new/index

[BillWagner]

This LGTM @gewarren

Let's