[GR-67459] Fix how hooks are registered in CustomHarnessBenchmarkSuite

PullRequest: mx/1958

Author: Andrija Kolic

src/mx/_impl/mx_benchmark.py

@@ -2451,7 +2451,7 @@ def __init__(self, custom_harness_command: CustomHarnessCommand, *args, supporte
             raise TypeError(f"Expected an instance of {CustomHarnessCommand.__name__}, instead got an instance of {custom_harness_command.__class__.__name__}")
         def custom_harness_hook(cmd, suite):
             return custom_harness_command.produceHarnessCommand(cmd, suite)
-        self.register_command_mapper_hook("custom-harness-hook", custom_harness_hook)
+        self.register_command_mapper_hook("custom-harness-hook", FunctionHookAdapter(custom_harness_hook))
         self._supported_trackers = supported_trackers if supported_trackers is not None else []
 
     @property

src/mx/mx_version.py

@@ -1,2 +1,2 @@
 # The version must be updated for every PR (checked in CI) and the comment should reflect the PR's issue
-version = "7.58.7"  # GR-66318: allow opening a package without any Java classes in it
+version = "7.58.8"  # GR-67459: Fix how hooks are registered in CustomHarnessBenchmarkSuite