Merge pull request #2826 from ekouts/bugfix/gpu_burn_exec_opts_hook

[testlib] Set `executable_opts` of GPU burn test in a pre-run hook

Author: vkarak

hpctestlib/microbenchmarks/gpu/gpu_burn.py

@@ -163,7 +163,7 @@ class gpu_burn_check(rfm.RunOnlyRegressionTest):
     valid_systems = ['+gpu']
     valid_prog_environs = ['+cuda', '+hip']
 
-    @run_after('init')
+    @run_before('run')
     def set_exec_opts(self):
         if self.use_dp:
             self.executable_opts += ['-d']