fix: use the proper entity key variable

[epmog]

What was the problem/requirement? (What/Why)

We were using a wrong and uninitialized variable when there were no successful entities

[session-8f546ac52c3e4b978b46ca5240e67d35] Entity {'jobDetails': {'jobId': 'job-685679cbca4a4bc39c6244304992058a'}} failed in an unrecoverable way: local variable 'entity_key' referenced before assignment

What was the solution? (How)

use the right one...

What is the impact of this change?

BatchGetJobEntity errors properly get reported by the worker agent

How was this change tested?

Tested in gamma and got the actual underlying error message

{'sessionaction-a4fd90b02c9d457fa528d44c7df6b182-0': {'startedAt': datetime.datetime(2023, 9, 1, 23, 9, 13, 96713, tzinfo=datetime.timezone.utc), 'completedStatus': 'FAILED', 'progressMessage': "Entity {'jobDetails': {'jobId': 'job-92b1831b602447bdbd58704df51f5691'}} failed with: ConflictException Storage profiles and file systems not found", 'endedAt': datetime.datetime(2023, 9, 1, 23, 9, 13, 96713, tzinfo=datetime.timezone.utc)}, 'sessionaction-a4fd90b02c9d457fa528d44c7df6b182-1': {'startedAt': datetime.datetime(2023, 9, 1, 23, 9, 13, 96713, tzinfo=datetime.timezone.utc), 'completedStatus': 'FAILED', 'progressMessage': "Entity {'jobDetails': {'jobId': 'job-92b1831b602447bdbd58704df51f5691'}} failed with: ConflictException Storage profiles and file systems not found", 'endedAt': datetime.datetime(2023, 9, 1, 23, 9, 13, 96713, tzinfo=datetime.timezone.utc)}}

ran

hatch run fmt
hatch run lint
hatch build
hatch run test

Was this change documented?

N/A

Is this a breaking change?

Fixing!