Reduce console output when running tests and update more tests to use ITestOutputHelper

[jeffkl]

Description

A couple of .NET test runs execute code paths that end up calling Console.WriteLine() which I find confusing when looking at a test run's output:

  The given project `ProjectA` has no vulnerable packages given the current sources.
  The given project `ProjectB` has no vulnerable packages given the current sources.
  Specify --help for a list of available options and commands.
  Specify --help for a list of available options and commands.
  Specify --help for a list of available options and commands.
  Specify --help for a list of available options and commands.
  Error processing request: The decryption operation failed, see inner exception.
  Error processing request: The decryption operation failed, see inner exception.
  Error processing request: The decryption operation failed, see inner exception.
  Error processing request: The decryption operation failed, see inner exception.
  Error processing request: The decryption operation failed, see inner exception.
  Error processing request: The decryption operation failed, see inner exception.

The "Error processing request" is coming from SelfSignedCertificateMockServer so I updated it to use ITestOutputHelper. I also updated more tests that weren't logging command output to ITestOutputHelper that @donnie-msft had reported.

Another change is to ListPackageConsoleRenderer to allow tests to capture its output instead of it writing to Console.Out.

PR Checklist

• PR has a meaningful title

• PR has a linked issue. N/A

• Described changes

• Tests

  • Automated tests added
  • OR
  • Test exception
  • OR
  • N/A

• Documentation

  • Documentation PR or issue filled
  • OR
  • N/A

[donnie-msft]

Awesome! More of these to come!
I wonder if implementing an attribute ctor pattern would make it simpler to add these.