Add SAS and other blob sanitization rules to the base framework

[pakrym]

Other services use storage and don't know they need to add sanitization rules.

[weshaggard]

We should see if there is a way to plugin the credscan detection library into the framework to try and sanitize all the text in the recording files.

[pakrym]

We should consider sanitizing bodies too or adding a post-recording check that would throw if SAS signature is found.

[JoshLove-msft]

@weshaggard can you provide more details on the credscan library that we use?

[pakrym]

Azure/azure-sdk-tools#1950 should handle this.

[JoshLove-msft]

Closing as this will be tracked by the linked Test Proxy issue - Azure/azure-sdk-tools#1950