Avoid trying to fix the trusted root certificates

[javiercn]

• The tool fails when a trusted certificate has already been installed.
• We were trying to fix the key for the localhost certificates on the system keychain (which don't have a key)
• This fix filters the certificates to fix to those found in the current user personal store (login keychain).
• I verified running multiple combinations of dotnet dev-certs with --clean and --trust.
  • Unfortunately we can't have automation for these cases as trying to access the key requires user interaction.
  • We will be expanding the set of CTI cases to cover this scenarios.