Replace customized tip notices with success notices

Stops standard tip notices in content from also being customized and displaying success icons.
This is more apparent after we've started rendering callout blocks as notice blocks.

See WordPress/wordpress.org#374

wp-content/themes/pub/wporg-learn-2024/patterns/sensei-lesson-columns.php

@@ -29,7 +29,7 @@
 
 		<?php if ( $is_completed ) : ?>
 			<!-- wp:wporg/notice {"style":{"spacing":{"margin":{"top":"var:preset|spacing|20"}}}} -->
-			<div class="wp-block-wporg-notice is-tip-notice" 
+			<div class="wp-block-wporg-notice is-success-notice" 
 				style="<?php echo $module ? 'margin-top:var(--wp--preset--spacing--20)' : 'margin-bottom:var(--wp--preset--spacing--50)'; ?>">
 				<div class="wp-block-wporg-notice__icon"></div>
 				<div class="wp-block-wporg-notice__content">

wp-content/themes/pub/wporg-learn-2024/patterns/sensei-quiz-notices.php

@@ -27,7 +27,7 @@
 	<!-- /wp:wporg/notice -->
 <?php elseif ( $is_pending_grade ) : ?>
 	<!-- wp:wporg/notice {"style":{"spacing":{"margin":{"top":0,"bottom":"var:preset|spacing|40"}}}} -->
-	<div class="wp-block-wporg-notice is-tip-notice" style="margin-top:-10px;margin-bottom:var(--wp--preset--spacing--40)">
+	<div class="wp-block-wporg-notice is-success-notice" style="margin-top:-10px;margin-bottom:var(--wp--preset--spacing--40)">
 		<div class="wp-block-wporg-notice__icon"></div>
 		<div class="wp-block-wporg-notice__content">
 			<p><?php esc_html_e( 'Well done! You completed the quiz.', 'wporg-learn' ); ?></p>

wp-content/themes/pub/wporg-learn-2024/src/style/_sensei.scss

@@ -14,14 +14,6 @@ body.sensei {
 	--sensei-module-lesson-color: var(--wp--preset--color--charcoal-1);
 	--sensei-lm-mobile-header-height: 60px;
 
-	.is-tip-notice .wp-block-wporg-notice__icon {
-		background: url(../../assets/icon-check.svg);
-	}
-
-	.wp-block-wporg-notice__icon {
-		height: 24px;
-	}
-
 	.wp-block-sensei-lms-course-theme-notices:empty {
 		display: none;
 	}