Site Profiler: Add a blur effect for locked metrics

[WBerredo]

Fixes https://github.com/Automattic/dotcom-forge/issues/6676

Proposed Changes

Add a blurry effect for locked metrics. The icon will also change to a locker.

Why are these changes being made?

The list of metrics should show blurred items when on teaser mode.

Testing Instructions

• Go to /site-profiler/:url. Ex: /site-profiler/example.com
• Scroll down and check if the metrics of the Health Scores section is blurred as the image above.

Pre-merge Checklist

• Has the general commit checklist been followed? (PCYsg-hS-p2)
• https://wpcalypso.wordpress.com/devdocs/docs/testing/index.md 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-107976

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-107976&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-107976&env=a8c-for-agencies

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Sections (~414 bytes added 📈 [gzipped])

name           parsed_size           gzip_size
site-profiler      +1083 B  (+1.1%)     +414 B  (+1.5%)

Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[gavande1]

Using the blur filter works as expected. However, I could easily see the hidden text by toggling one CSS rule. Is there any better way to achieve similar results? Do we want to obfuscate the details in any way?

[WBerredo]

My idea here is really to use text that doesn't mean much to be blurred (as the sentences I added in useLockedInsights).

This should also help us to not need to retrieve any information at this step, which will not be available yet.

[JulianBustamante]

I think if we want to obfuscate the text we could generate a temp image from the backend with the blurred text.

[WBerredo]

But at this point, we don't have the data, the blurred text is to be shown during teaser stage.

[JulianBustamante]

LGTM!