feat: add a stack_trace field to the Error messages specifying where …

…the error occured feat: add call_log_level field to Execution messages doc: clarify requirement to escape strings within JSON arguments (#220)

- [ ] Regenerate this pull request now.

Update the Execution proto with stack_trace field which is populated on output if an error occurs, and the call_log_level field can be specified on input to request that function calls and/or errors for the given execution be logged to Cloud Logging.

PiperOrigin-RevId: 407842136

Source-Link: googleapis/googleapis@cd48c16

Source-Link: googleapis/googleapis-gen@eefbcd7
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