Use wp.i18n for translatable strings in wp-admin/js/dashboard.js

[ocean90]

We can replace the use of wp_localize_script() with the proper JavaScript i18n functions introduced in WordPress 5.0, see #20491 and #45103. This ticket is for wp-admin/js/dashboard.js.

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#51498

Use wp.i18n for translatable strings in wp-admin/js/dashboard.js

[ocean90]

In 49151:

I18N: Use wp.i18n for translatable strings in wp-admin/js/dashboard.js.

• Deprecate the l10n property on communityEventsData.
• Introduce version parameter for deprecateL10nObject and backfill the version for deprecated objects in 5.5.0.
• Add a noop version of deprecateL10nObject for QUnit testing.

Fixes #51498.