Running each on their own line fixes the issue (#5614)

What changed?
Split the different runs into their own lines, so the whole script fails when one of them fails.

Linting is expected to fail as the lint issues fixed in this PR #5613 is not merged yet

Why?
Currently the script will not fail even though the lint fails

How did you test it?
Tested locally

scripts/buildkite/golint.sh

@@ -2,7 +2,10 @@
 
 set -ex
 
-make go-generate && make fmt && make lint && make copyright
+make go-generate
+make fmt 
+make lint 
+make copyright
 
 # intentionally capture stderr, so status-errors are also PR-failing.
 # in particular this catches "dubious ownership" failures, which otherwise