Strip new lines from error details

The error details message should just be one string without spacing
so the terminal can set a output length. This will allow messages
from Ruby and Go errors to have similar formating.

internal/core/vagrantfile.go

@@ -525,6 +525,7 @@ func (v *Vagrantfile) TargetConfig(
 						"provider_not_usable",
 						map[string]string{"Provider": provider, "Machine": name},
 						errStatus,
+						true,
 					)
 				}
 			}

plugins/commands/serve/util/exception_transformer.rb

@@ -58,7 +58,7 @@ module VagrantPlugins
                 if err.is_a? Vagrant::Errors::VagrantError
                   localized_msg_details_any = Google::Protobuf::Any.new
                   localized_msg_details_any.pack(
-                    Google::Rpc::LocalizedMessage.new(locale: "en-US", message: message)
+                    Google::Rpc::LocalizedMessage.new(locale: "en-US", message: message.gsub("\n", " "))
                   )
                   proto = Google::Rpc::Status.new(
                     code: GRPC::Core::StatusCodes::UNKNOWN,