Apply callout button style to AS selection panel error notice

[nfmohit]

Summary

Addresses issue:

• Update the Audience Selection Panel Error Notice to use the new callout buttons #9068

Relevant technical choices

This PR applies the new callout button styles to the Audience Segmentation error notice buttons.

PR Author Checklist

• My code is tested and passes existing unit tests.
• My code has an appropriate set of unit tests which all pass.
• My code is backward-compatible with WordPress 5.2 and PHP 7.4.
• My code follows the WordPress coding standards.
• My code has proper inline documentation.
• I have added a QA Brief on the issue linked above.
• I have signed the Contributor License Agreement (see https://cla.developers.google.com/).

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Code Reviewer Checklist

• Run the code.
• Ensure the acceptance criteria are satisfied.
• Reassess the implementation with the IB.
• Ensure no unrelated changes are included.
• Ensure CI checks pass.
• Check Storybook where applicable.
• Ensure there is a QA Brief.
• Ensure there are no unexpected significant changes to file sizes.

Merge Reviewer Checklist

• Ensure the PR has the correct target branch.
• Double-check that the PR is okay to be merged.
• Ensure the corresponding issue has a ZenHub release assigned.
• Add a changelog message to the issue.

[github-actions]

Build files for 1e3c946 have been deleted.

[github-actions]

Size Change: +503 B (+0.03%)

Total Size: 1.86 MB

Filename	Size	Change
./dist/assets/css/googlesitekit-admin-css-********************.min.css	58 kB	+405 B (+0.7%)
./dist/assets/js/googlesitekit-main-dashboard-********************.js	157 kB	+31 B (+0.02%)
./dist/assets/js/googlesitekit-modules-analytics-4-********************.js	171 kB	+23 B (+0.01%)
./dist/assets/js/googlesitekit-settings-********************.js	128 kB	+28 B (+0.02%)
./dist/assets/js/googlesitekit-widgets-********************.js	88 kB	+16 B (+0.02%)

ℹ️ View Unchanged

Filename	Size
./dist/assets/css/googlesitekit-adminbar-css-********************.min.css	11.8 kB
./dist/assets/css/googlesitekit-authorize-application-css-********************.min.css	846 B
./dist/assets/css/googlesitekit-wp-dashboard-css-********************.min.css	8.2 kB
./dist/assets/js/31-********************.js	2.76 kB
./dist/assets/js/32-********************.js	2.25 kB
./dist/assets/js/33-********************.js	3.64 kB
./dist/assets/js/34-********************.js	935 B
./dist/assets/js/35-********************.js	892 B
./dist/assets/js/36-********************.js	3.12 kB
./dist/assets/js/analytics-advanced-tracking-********************.js	901 B
./dist/assets/js/googlesitekit-activation-********************.js	23.9 kB
./dist/assets/js/googlesitekit-ad-blocking-recovery-********************.js	72.5 kB
./dist/assets/js/googlesitekit-adminbar-********************.js	34.6 kB
./dist/assets/js/googlesitekit-api-********************.js	9.97 kB
./dist/assets/js/googlesitekit-components-gm2-********************.js	5.97 kB
./dist/assets/js/googlesitekit-components-gm3-********************.js	10.1 kB
./dist/assets/js/googlesitekit-consent-mode-********************.js	25.6 kB
./dist/assets/js/googlesitekit-data-********************.js	2.37 kB
./dist/assets/js/googlesitekit-datastore-forms-********************.js	8.95 kB
./dist/assets/js/googlesitekit-datastore-location-********************.js	2.08 kB
./dist/assets/js/googlesitekit-datastore-site-********************.js	20.4 kB
./dist/assets/js/googlesitekit-datastore-ui-********************.js	9.92 kB
./dist/assets/js/googlesitekit-datastore-user-********************.js	26.2 kB
./dist/assets/js/googlesitekit-entity-dashboard-********************.js	83.4 kB
./dist/assets/js/googlesitekit-events-provider-contact-form-7-********************.js	646 B
./dist/assets/js/googlesitekit-events-provider-easy-digital-downloads-********************.js	624 B
./dist/assets/js/googlesitekit-events-provider-mailchimp-********************.js	630 B
./dist/assets/js/googlesitekit-events-provider-ninja-forms-********************.js	712 B
./dist/assets/js/googlesitekit-events-provider-optin-monster-********************.js	675 B
./dist/assets/js/googlesitekit-events-provider-popup-maker-********************.js	634 B
./dist/assets/js/googlesitekit-events-provider-woocommerce-********************.js	657 B
./dist/assets/js/googlesitekit-events-provider-wpforms-********************.js	633 B
./dist/assets/js/googlesitekit-i18n-********************.js	3.93 kB
./dist/assets/js/googlesitekit-modules-********************.js	22.1 kB
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./dist/assets/js/googlesitekit-modules-adsense-********************.js	125 kB
./dist/assets/js/googlesitekit-modules-pagespeed-insights-********************.js	22.5 kB
./dist/assets/js/googlesitekit-modules-reader-revenue-manager-********************.js	21.9 kB
./dist/assets/js/googlesitekit-modules-search-console-********************.js	58.8 kB
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./dist/assets/js/googlesitekit-polyfills-********************.js	377 B
./dist/assets/js/googlesitekit-splash-********************.js	90.9 kB
./dist/assets/js/googlesitekit-user-input-********************.js	64.3 kB
./dist/assets/js/googlesitekit-vendor-********************.js	321 kB
./dist/assets/js/googlesitekit-wp-dashboard-********************.js	62 kB
./dist/assets/js/runtime-********************.js	1.3 kB

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[hussain-t]

Great work, @nfmohit! I’ve left a few comments regarding introducing a new class—please take a look; thanks.

[hussain-t]

Excellent work, @nfmohit! LGTM 👍

Note: I've verified that the CI build failures are unrelated to this PR.