MDL-84647 theme_boost: Fix coloured table rows

After the Bootstrap 5 upgrade, table rows with defined text colour
(using "text-muted" helper class) were not affecting the inner cells.
Add a custom rule in tables.scss to avoid that behaviour.

theme/boost/scss/moodle/tables.scss

@@ -57,6 +57,11 @@
             }
         }
     }
+    // Allow table cells to inherit text color and background color from table rows.
+    tbody td {
+        color: inherit;
+        background-color: inherit;
+    }
 }
 
 table {

theme/boost/style/moodle.css

@@ -37334,6 +37334,10 @@ img.userpicture {
 .generaltable tbody tr:hover td.sticky-column {
   background-color: rgba(var(--bs-emphasis-color-rgb), 0.075);
 }
+.generaltable tbody td {
+  color: inherit;
+  background-color: inherit;
+}
 
 table caption {
   font-size: 24px;

theme/classic/style/moodle.css

@@ -37340,6 +37340,10 @@ img.userpicture {
 .generaltable tbody tr:hover td.sticky-column {
   background-color: rgba(var(--bs-emphasis-color-rgb), 0.075);
 }
+.generaltable tbody td {
+  color: inherit;
+  background-color: inherit;
+}
 
 table caption {
   font-size: 24px;