Remove the dependency between two ink editor integration tests

The second test of the basic operations block for the ink editor
depends on the first test to work. This becomes visible if we only run
the second test, using `fit`, which always fails with:

`ProtocolError: Waiting for selector '.annotationEditorLayer' failed:
Runtime.callFunctionOn timed out. Increase the 'protocolTimeout' setting
in launch/connect calls for a higher timeout if needed.`

The problem is that the second test doesn't enable the ink editor and
relies on the first test having done that already (because we don't
close the document between tests yet). This commit fixes the issue by
unconditionally enabling the ink editor in the second test to remove the
dependency between the two tests so they both pass in isolation.

test/integration/ink_editor_spec.mjs

@@ -113,6 +113,8 @@ describe("Ink Editor", () => {
         pages.map(async ([browserName, page]) => {
           await clearAll(page);
 
+          await switchToInk(page);
+
           const rect = await getRect(page, ".annotationEditorLayer");
 
           const xStart = rect.x + 300;