[FIX] web: restore card-body border corners

Again (and definitely?) completes https://github.com/odoo/odoo/pull/29253

As the mentioned PR forces a background on card bodies, that background
went over the card border corners as those are rounded. This commit
fixes that by adding the correct border radius on card bodies, the same
way bootstrap does it by default for card headers and card footers.

closes odoo/odoo#29325

addons/web/static/src/scss/bootstrap_review.scss

@@ -23,6 +23,13 @@
     // will use the color of a default card background with a light opacity.
     // Limitation: bg-* utilities cannot be used on card-body elements anymore.
     @include o-bg-color(rgba($card-bg, $o-card-body-bg-opacity));
+
+    &:first-child {
+        @include border-top-radius($card-inner-border-radius);
+    }
+    &:last-child {
+        @include border-bottom-radius($card-inner-border-radius);
+    }
 }
 
 // Modify modals so that their scrollable element is the modal-body (except in