always show the filters and search bar (#41163)

<!-- Add the related story/sub-task/bug number, like Resolves #123, or
remove if NA -->
**Related issue:** Resolves #40327 

# Checklist for submitter

If some of the following don't apply, delete the relevant line.

- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.

## Testing

- [x] QA'd all new/changed functionality manually

changes/40327-filter

@@ -0,0 +1 @@
+- Updated host software library to always allow filtering.

frontend/pages/hosts/details/cards/HostSoftwareLibrary/HostSoftwareLibraryTable/HostSoftwareLibraryTable.tsx

@@ -156,12 +156,6 @@ const HostSoftwareLibraryTable = ({
     return <EmptySoftwareTable noSearchQuery={searchQuery === ""} />;
   }, [searchQuery]);
 
-  // Determines if a user should be able to filter or search in the table
-  const hasData = data && data.software.length > 0;
-  const hasQuery = searchQuery !== "";
-
-  const showFilterHeaders = hasData || hasQuery;
-
   if (isAndroid(platform)) {
     return (
       <EmptyTable
@@ -212,11 +206,11 @@ const HostSoftwareLibraryTable = ({
         pageSize={DEFAULT_PAGE_SIZE}
         inputPlaceHolder="Search by name"
         onQueryChange={onQueryChange}
-        customControl={showFilterHeaders ? renderCustomControls : undefined}
+        customControl={renderCustomControls}
         emptyComponent={memoizedEmptyComponent}
         showMarkAllPages={false}
         isAllPagesSelected={false}
-        searchable={showFilterHeaders}
+        searchable
         manualSortBy
       />
     </div>