[FIX] web, portal: re-introduce w-0 and h-0 utility classes

When updating bootstrap to bootstrap 5 with [1], the h-0 and w-0
extended utility classes were lost.

This commit adds them back, using the Utility API of Bootstrap described
here [2], and the $utilities-sizes from [3]. Therefore, the code
introduced in [4] is not needed anymore (those classes are now available
in all Odoo instead of just the frontend).

This commit fixes the footer "scroll to top" option of the website
builder.

[1]: https://github.com/odoo/odoo/commit/971e5a91aab9
[2]: https://getbootstrap.com/docs/5.0/utilities/api/
[3]: https://github.com/odoo/odoo/commit/e377a084174d
[4]: https://github.com/odoo/odoo/commit/da55072a6935

closes odoo/odoo#101691

X-original-commit: 3a2ad02962fdea254ca46af1f7728b537a6af9cd
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

addons/portal/__manifest__.py

@@ -36,7 +36,6 @@ a dependency towards website editing and customization capabilities.""",
             'portal/static/src/views/**/*',
         ],
         'web.assets_frontend': [
-            'portal/static/src/scss/bootstrap.extend.scss',
             'portal/static/src/scss/portal.scss',
             'portal/static/src/js/portal.js',
             'portal/static/src/js/portal_chatter.js',

addons/portal/static/src/scss/bootstrap.extend.scss

@@ -1,13 +0,0 @@
-@each $breakpoint in map-keys($grid-breakpoints) {
-    @include media-breakpoint-up($breakpoint) {
-        $infix: breakpoint-infix($breakpoint, $grid-breakpoints);
-
-        @if $infix != '' { // Standard ones are already created by bootstrap
-            @each $prop, $abbrev in (width: w, height: h) {
-                @each $size, $length in $sizes {
-                    .#{$abbrev}#{$infix}-#{$size} { #{$prop}: $length !important; }
-                }
-            }
-        }
-    }
-}

addons/portal/static/src/scss/bootstrap_overridden.scss

@@ -12,12 +12,6 @@ $gray-900: #212529 !default;
 
 $gray-300: #dee2e6 !default;
 
-// This variable affects the `.h-*` and `.w-*` classes.
-$sizes: () !default;
-$sizes: map-merge((
-    0: 0,
-), $sizes);
-
 // Body
 //
 // Settings for the `<body>` element.

addons/web/static/src/scss/utilities_custom.scss

@@ -98,12 +98,14 @@ $utilities: map-merge(
             map-get($utilities, "width"),
             (
                 responsive: true,
+                values: $utilities-sizes,
             ),
         ),
         "height": map-merge(
             map-get($utilities, "height"),
             (
                 responsive: true,
+                values: $utilities-sizes,
             ),
         ),
         "max-width": map-merge(