gt-e2e: always click close after inserting block on mobile

[heavyweight]

For mobile viewports we are always waiting for the block inserter to automatically close before we click on the close icon.
Since we need to explicitly close the block inserter after adding a block, this check adds a lot of extra execution time to our e2e tests.

Related to #
#92945

Proposed Changes

• Avoid waiting to the inserter to automatically close

Why are these changes being made?

• To avoid unnecessary waiting in our e2e tests

Testing Instructions

$VIEWPORT_NAME="mobile" TEST_ON_ATOMIC="true" GUTENBERG_EDGE=true yarn workspace wp-e2e-tests test --group=gutenberg --maxWorkers=1 --workerIdleMemoryLimit=1GB
*

Pre-merge Checklist

• Has the general commit checklist been followed? (PCYsg-hS-p2)
• Have you written new tests for your changes?
• Have you tested the feature in Simple (P9HQHe-k8-p2), Atomic (P9HQHe-jW-p2), and self-hosted Jetpack sites (PCYsg-g6b-p2)?
• Have you checked for TypeScript, React or other console errors?
• Have you used memoizing on expensive computations? More info in Memoizing with create-selector and Using memoizing selectors and Our Approach to Data
• Have we added the "[Status] String Freeze" label as soon as any new strings were ready for translation (p4TIVU-5Jq-p2)?
• For changes affecting Jetpack: Have we added the "[Status] Needs Privacy Updates" label if this pull request changes what data or activity we track or use (p4TIVU-aUh-p2)?

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-115542

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-115542&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-115542&env=a8c-for-agencies

[matticbot]

This PR does not affect the size of JS and CSS bundles shipped to the user's browser.

Generated by performance advisor bot at iscalypsofastyet.com.