Remove newlines from error message

Newlines can cause trouble with translations as well as presentation in
the UI. This particular string doesn't actually need the newline as part
of the translation string, so this commit changes it to just not have it.

Alternative to #23213

app/models/miq_provision_virt_workflow.rb

@@ -772,11 +772,7 @@ def self.from_ws_ver_1_0(version, user, src_name, target_name, auto_approve, tag
     values[:vm_tags] = p.ws_tags(tags, :parse_ws_string_v1)
     values[:ws_values] = p.ws_values(additional_values, :parse_ws_string_v1)
 
-    if p.validate(values) == false
-      errors = []
-      p.fields { |_fn, f, _dn, _d| errors << f[:error] unless f[:error].nil? }
-      raise _("Provision failed for the following reasons:\n%{errors}") % {:errors => errors.join("\n")}
-    end
+    p.raise_validate_errors if p.validate(values) == false
 
     p.make_request(nil, values, nil, auto_approve)
   end

app/models/miq_request_workflow.rb

@@ -1507,9 +1507,9 @@ def ws_schedule_fields(values, _fields, data)
   def raise_validate_errors
     errors = []
     fields { |_fn, f, _dn, _d| errors << f[:error] unless f[:error].nil? }
-    err_text = "Provision failed for the following reasons:\n#{errors.join("\n")}"
-    _log.error("<#{err_text}>")
-    raise _("Provision failed for the following reasons:\n%{errors}") % {:errors => errors.join("\n")}
+    err_str = errors.join("\n")
+    _log.error("<Provision failed for the following reasons:\n#{err_str}>")
+    raise _("Provision failed for the following reasons:") << "\n" << err_str
   end
 
   private