Remove the informational text about allowing only 2 categories in upload integrations (elastic#270427)

This pr removes the informational and incorrect text about allowing only 2 categories on upload integrations.

Author: robester0403

x-pack/platform/plugins/shared/fleet/public/applications/integrations/sections/epm/screens/detail/components/edit_integration_flyout.tsx

@@ -67,6 +67,11 @@ export const EditIntegrationFlyout: React.FunctionComponent<{
 }) => {
   const updateCustomIntegration = useUpdateCustomIntegration;
 
+  const isUploadedIntegration =
+    packageInfo != null &&
+    'installationInfo' in packageInfo &&
+    packageInfo.installationInfo?.install_source === 'upload';
+
   // Get all the possible categories
   const { data: categoriesData } = useGetCategoriesQuery({
     prerelease: false,
@@ -187,10 +192,12 @@ export const EditIntegrationFlyout: React.FunctionComponent<{
             />
           }
           helpText={
-            <FormattedMessage
-              id="xpack.fleet.epm.editIntegrationFlyout.categoriesHelpText"
-              defaultMessage="You can assign up to two categories to your integration."
-            />
+            !isUploadedIntegration && (
+              <FormattedMessage
+                id="xpack.fleet.epm.editIntegrationFlyout.categoriesHelpText"
+                defaultMessage="You can assign up to two categories to your integration."
+              />
+            )
           }
         >
           <EuiComboBox
@@ -202,7 +209,7 @@ export const EditIntegrationFlyout: React.FunctionComponent<{
             options={parentCategories?.map((category) => ({
               label: category.title,
               value: category.id,
-              disabled: selectedCategories.length >= 2,
+              disabled: !isUploadedIntegration && selectedCategories.length >= 2,
             }))}
             onChange={(selectedOptions) => {
               const selectedValues = selectedOptions as SelectOption[];