test(playwright): key the Configure bulk-Apply click by data-test (strict-mode collision with the grouped 'Apply to n' button)

The grouped Connection Bindings panel (77f4af0d) added a per-group
'Apply to n' button, so InstanceConfigureTests' Name = "Apply" role
locator started matching two elements and failing Playwright's strict
mode. Adds data-test="binding-bulk-apply" alongside the existing
binding-bulk-select / binding-group-apply keys and clicks that instead.

Claude-Session: https://claude.ai/code/session_01G2GHPnbbKGvyyfbr2XBRVH

tests/ZB.MOM.WW.ScadaBridge.CentralUI.PlaywrightTests/Deployment/InstanceConfigureTests.cs

@@ -55,7 +55,10 @@ public sealed class InstanceConfigureTests : IClassFixture<InstanceConfigureFixt
         // Bulk-assign every bindable attribute to the fixture connection, then Apply + Save.
         // Select by VALUE (the connection id) — most robust, since the select binds _bulkConnectionId.
         await bulkSelect.SelectOptionAsync(new SelectOptionValue { Value = _cfg.ConnectionId.ToString() });
-        await page.GetByRole(AriaRole.Button, new() { Name = "Apply" }).ClickAsync();
+        // Keyed, not by accessible name: the grouped-bindings panel (77f4af0d) added a
+        // per-group "Apply to n" button, so a Name = "Apply" role locator now matches two
+        // elements and fails Playwright's strict mode.
+        await page.Locator("[data-test='binding-bulk-apply']").ClickAsync();
         await page.GetByRole(AriaRole.Button, new() { Name = "Save Bindings" }).ClickAsync();
 
         await Assertions.Expect(page.Locator(".toast")).ToHaveCountAsync(1, new() { Timeout = 15_000 });