Blocks E2E: Do not report slow tests

[WunderBart]

Changes proposed in this Pull Request:

Currently, we're seeing a lot of Slow Test warnings in both CI and local test reports, e.g.:

Let's disable Playwright's slow test reporting, as it can be confusing because we're not running our tests in parallel.

This setting is also consistent with the core config.

How to test the changes in this Pull Request:

Ensure there are no more slow test reports.

Changelog entry

• Automatically create a changelog entry from the details below.

Significance

• Patch
• Minor
• Major

Type

• Fix - Fixes an existing bug
• Add - Adds functionality
• Update - Update existing functionality
• Dev - Development related task
• Tweak - A minor adjustment to the codebase
• Performance - Address performance issues
• Enhancement - Improvement to existing functionality

Message

Disable the reportSlowTests option for blocks' E2E tests.

Comment

[github-actions]

Hi @gigitux, @woocommerce/woo-fse

Apart from reviewing the code changes, please make sure to review the testing instructions as well.

You can follow this guide to find out what good testing instructions should look like:
https://github.com/woocommerce/woocommerce/wiki/Writing-high-quality-testing-instructions

[gigitux]

It makes sense! LGTM! Thanks!

[github-actions]

Test Results Summary

Commit SHA: a451ad3

Test 🧪	Passed ✅	Failed 🚨	Broken 🚧	Skipped ⏭️	Unknown ❔	Total 📊	Duration ⏱️
API Tests	259	0	0	2	0	261	0m 38s
E2E Tests	341	0	0	10	0	351	7m 29s

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To view the full API test report, click here.
To view the full E2E test report, click here.
To view all test reports, visit the WooCommerce Test Reports Dashboard.