Fix dependency install script on RHEL derivatives (#9684)

Jakob Grønhaug created 

Added a check to `script/linux` so the script does not try to enable CSB
or add EPEL if the user is on Fedora, which does not need these steps.
The script now runs nicely on Fedora! :)

Release Notes:

- N/A

Change summary

script/linux | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

Detailed changes

script/linux 🔗 

@@ -40,9 +40,11 @@ if [[ -n $dnf ]]; then
     libzstd-devel
     vulkan-loader
   )
-  # libxkbcommon-x11-devel is in the crb repo
-  $maysudo "$dnf" config-manager --set-enabled crb
-  $maysudo "$dnf" install epel-release epel-next-release
+
+  # libxkbcommon-x11-devel is in the crb repo on RHEL and CentOS, not needed for Fedora
+  if ! grep -q "Fedora" /etc/redhat-release; then
+    $maysudo "$dnf" config-manager --set-enabled crb
+  fi
 
   $maysudo "$dnf" install -y "${deps[@]}"
   exit 0