Decide on feature experience for bicep.completions.getAllAccessibleAzureContainerRegistries

[StephenWeatherford]

When this option is turned on, you see this:

  ..
  br/public
  ts/
  br:
     ->
        mcr.microsoft.com/bicep
        configured-in-bicepconfig.azurecr.io/path
        configured-in-bicepconfig-2.azurecr.io/path
        configured-in-bicepconfig-3.azurecr.io/path
         registry-accessible-to-users-azure-subscription-1.azurecr.io
         registry-accessible-to-users-azure-subscription-2.azurecr.io
         registry-accessible-to-users-azure-subscription-3.azurecr.io
         registry-accessible-to-users-azure-subscription-4.azurecr.io
         registry-accessible-to-users-azure-subscription-5.azurecr.io
  ts:

The "registry-accessible-to-users-azure-subscription-*.azurecr.io" can be very long. I think the following would be more helpful and could be enabled by default:

  ..
  br/public
  ts/
  br:
     ->
        mcr.microsoft.com/bicep
        configured-in-bicepconfig.azurecr.io/path
        configured-in-bicepconfig-2.azurecr.io/path
        configured-in-bicepconfig-3.azurecr.io/path
        more...
            ->
                 registry-accessible-to-users-azure-subscription-1.azurecr.io
                 registry-accessible-to-users-azure-subscription-2.azurecr.io
                 registry-accessible-to-users-azure-subscription-3.azurecr.io
                 registry-accessible-to-users-azure-subscription-4.azurecr.io
                 registry-accessible-to-users-azure-subscription-5.azurecr.io
  ts: