Wizard: Update search input placeholders

The placeholders we tend to use are usually quite specific. "Type to search" felt quite vague for some reason. Also repositories had no placeholder, I believe "filter" is clearer than "search" here as we're not fetching any results, just filtering through the already existing list of repositories.

src/Components/CreateImageWizard/steps/Packages/Packages.tsx

@@ -1243,7 +1243,7 @@ const Packages = () => {
             <ToolbarItem variant="search-filter">
               <SearchInput
                 type="text"
-                placeholder="Type to search"
+                placeholder="Search packages"
                 aria-label="Search packages"
                 data-testid="packages-search-input"
                 value={searchTerm}

src/Components/CreateImageWizard/steps/Repositories/Repositories.tsx

@@ -524,7 +524,8 @@ const Repositories = () => {
             </ToolbarItem>
             <ToolbarItem variant="search-filter">
               <SearchInput
-                aria-label="Search repositories"
+                placeholder="Filter repositories"
+                aria-label="Filter repositories"
                 onChange={handleFilterRepositories}
                 value={filterValue}
                 onClear={() => setFilterValue('')}

src/test/Components/CreateImageWizard/steps/Repositories/Repositories.test.tsx

@@ -116,7 +116,7 @@ const toggleAll = async () => {
 const searchForRepository = async (searchTerm: string) => {
   const user = userEvent.setup();
   const searchInput = await screen.findByRole('textbox', {
-    name: /search repositories/i,
+    name: /filter repositories/i,
   });
   await waitFor(() => user.type(searchInput, searchTerm));
 };
@@ -270,7 +270,7 @@ describe('Repositories request generated correctly', () => {
 
   const selectNginxRepository = async () => {
     const user = userEvent.setup();
-    const search = await screen.findByLabelText('Search repositories');
+    const search = await screen.findByLabelText('Filter repositories');
     await waitFor(() => user.type(search, 'nginx stable repo'));
     await waitFor(
       () => expect(screen.getByText('nginx stable repo')).toBeInTheDocument

src/test/Components/CreateImageWizard/steps/Snapshot/Snapshot.test.tsx

@@ -65,7 +65,7 @@ const clickRevisitButton = async () => {
 
 const searchForRepository = async (repo: string) => {
   const user = userEvent.setup();
-  const search = await screen.findByLabelText('Search repositories');
+  const search = await screen.findByLabelText('Filter repositories');
   await waitFor(() => user.type(search, repo));
   await waitFor(() => expect(screen.getByText(repo)).toBeInTheDocument);
 };