treewide: override pnpm nodejs versions
Some packages in nixpkgs were using different nodejs versions, but were
not overriding pnpm to match. Apart from reducing the derivation size,
this could prevent future issues due to version mismatches.
Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>
(cherry picked from commit 89153437081e68e880af10060dce996e570efd76)