🐛 Optimize Relap widget loading

[advzr]

🐛 Fixes #38474

Also fixed widget examples

[CLAassistant]

All committers have signed the CLA.

[amp-owners-bot[bot]]

Hey @ampproject/wg-caching! These files were changed:

validator/testdata/feature_tests/ads.html
validator/testdata/feature_tests/ads.out

[erwinmombay]

you might want to rebase this and push the code to the PR again cause it seems circle CI got stuck

[powerivq]

Look like the validator error is real. Can you fix? @advzr

[advzr]

Fixed validation errors. Failing tests probably caused by the upstream code. I will wait for a new nightly build and rebase my code on it.

[powerivq]

Adding @erwinmombay for bundle size approval. It only affects this specific vendor bundle so shouldn't be a big deal.

[advzr]

Ping. @erwinmombay will you approve bundle size and owners check?

[ampprojectbot]

Warning: disparity between this PR Percy build and its main build

The Percy build for this PR was approved (either manually by a member of the AMP team, or automatically if there were no visual diffs). However, during a continuous integration step we generated another Percy build using the commit on the main branch that this PR was merged into, and there appears to be a mismatch between the two.

This is possibly an indication of an issue with this pull request, but could also be the result of flakiness. Please inspect the two builds < This PR's Percy build / main commit's Percy build > and determine further action:

• If the disparity appears to be caused by this PR, please create an bug report or send out a new PR to fix
• If the disparity appears to be a flake, please @-mention ampproject/wg-approvers in a comment
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