QA: Rescue errors when updating allure report metadata

What does this MR do and why?

Describe in detail what your merge request does and why.

There is a rather odd issue where a job can fail because allure metadata formatter calls dig method on rspec example metadata object which somehow becomes string. This is even more odd as the formatter should get called during test run, yet errors appears after spec finished execution.

https://gitlab.com/gitlab-org/gitlab-qa-mirror/-/jobs/2400345129

Rescue errors for now to not affect the job status

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