[PLT-1452] Vb/fix flaky annotation test plt 1452

[vbrodsky]

Description

Addresses 'flakiness' in creating data rows for LLM project by adding a wait till the data rows are created

First commit is a fix, 2d commit is a change due to running linter on a pytest conf file

NOTE due to the nature of LLM projects, data rows are created async / offline. We try 5 times with a sleep of 1s to wait for those data rows. If data row still fails to create it would indicate an stage or backend issue, not a test issue

Fixes # (issue)

Type of change

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[vbrodsky]

#1798 will supercede this PR