Add tests for new "auto update" front-end (#37877)

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**Related issue:** For #35459 

# Details

This PR adds front-end tests for:

* `<SoftwareSummaryCard>`
* Smoke-test of basic functionality (showing the software title and
type, showing an icon)
  * Action dropdown options for various kinds of software
*  `<EditAutoUpdateConfigModal>`
* Options for auto-updates (enable button, maintenance window
validation)
   * Targets ("All hosts" and "Custom" values and validation)
* Form submission (ensuring the API receives the expected payload for
various permutations of the form)

The `<TargetLabelSelector>` component has its own tests so we don't go
through it thoroughly here, just integration tests with the new
component. Conversely the `<SoftwareDetailsSummary>` component _doesn't_
have its own tests, and could use some, but in this instance we're just
concerned with how it integrates with the software summary card (that
is, how the passed-in software title affects the Actions dropdown).

## Testing

- [X] Added/updated automated tests

---------

Co-authored-by: Gabriel Hernandez <ghernandez345@gmail.com>
Co-authored-by: Nico <32375741+nulmete@users.noreply.github.com>

frontend/components/forms/fields/DropdownWrapper/DropdownWrapper.tsx

@@ -42,7 +42,7 @@ const CustomOption = (props: CustomOptionProps) => {
   const { data, ...rest } = props;
 
   const optionContent = (
-    <div className={`${baseClass}__option`}>
+    <div className={`${baseClass}__option`} data-testid="dropdown-option">
       {data.label}
       {data.helpText && (
         <span className={`${baseClass}__help-text`}>{data.helpText}</span>