…the error occurred (#113)

- [ ] 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: https://github.com/googleapis/googleapis-gen/commit/eefbcd70342adee1df52e4c595243da751e5b6a9
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiZWVmYmNkNzAzNDJhZGVlMWRmNTJlNGM1OTUyNDNkYTc1MWU1YjZhOSJ9

feat: add call_log_level field to Execution messages
doc: clarify requirement to escape strings within JSON arguments

🤖 I have created a release \*beep\* \*boop\*
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## [1.5.0](https://www.github.com/googleapis/python-workflows/compare/v1.4.1...v1.5.0) (2021-11-05)


### Features

* add a stack_trace field to the Error messages specifying where the error occurred ([#113](https://www.github.com/googleapis/python-workflows/issues/113)) ([22f55d3](https://www.github.com/googleapis/python-workflows/commit/22f55d30c57d31bf8d0839bd7289e1392ff65a18))
* add call_log_level field to Execution messages ([22f55d3](https://www.github.com/googleapis/python-workflows/commit/22f55d30c57d31bf8d0839bd7289e1392ff65a18))
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