Revert "Removed class that was causing issues with the logout button"

This reverts commit 827e496.

frontend/src/assets/styles/global.scss

@@ -71,6 +71,15 @@
   --cds-support-error: #E72000;
 }
 
+.heading-buttons {
+  display: flex;
+  gap: 2.5rem;
+  --cds-text-inverse: var(--border-subtle-02);
+  --cds-button-tertiary: var(--border-subtle-02);
+  --cds-button-tertiary-hover: var(--others-transparent-transparent);
+  --cds-link-primary: var(--border-subtle-02);
+}
+
 .heading-buttons cds-button span {
   width: 7rem;
 }
@@ -331,7 +340,6 @@ hr {
   font-weight: 400;
   line-height: 2.5rem; /* 125% */
 }
-
 .body-01 {
   color: var(--light-theme-text-text-secondary, #606062);
 
@@ -594,7 +602,6 @@ hr {
   gap: 0.125rem;
   flex: 1 0 0;
 }
-
 .grouping-09 {
   align-self: stretch;
   display: flex;