Remove spurious or irrelevant error messages from portable runner log output.

[damccorm]

This is a tracking bug for various other bugs that cause misleading log messages to be printed in the output of portable runners. Such messages usually don't actually affect pipeline execution, but they pollute logs, making it difficult for developers and users to diagnose legitimate issues.

Imported from Jira BEAM-9853. Original Jira may contain additional context.
Reported by: ibzib.

[damccorm]

The following subtask(s) are associated with this issue: #20149, #20150