Update displayed error message for enterprise policies

[neelip]

Fixes #54175005

Changes proposed:

• Currently the response shows as such:
  
• Updated to only show the text in "detail" rathe than displaying the whole json object in the response.

Other Tasks:

• If you updated the Go SDK did you update the PackageVersion in tunnels.go
• If you updated the TS SDK did you update the dependencies in package.json for connections and management to require a dependency that is > the current published version(Found using npm view @microsoft/dev-tunnels-contracts). This will fix issues where yarn will pull the old version of packages and will cause mismatched dependencies. See example PR

[IlyaBiryukov]

Is this going to be a breaking change for the client because the service still returns a string, not JSON in this case?

[neelip]

Is this going to be a breaking change for the client because the service still returns a string, not JSON in this case?

The Enterprise policies should be sending the json object with the latest release. All 3 policies only send JSON object.