fix: stop using removed worker agent CLI argument

[jusiskin]

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

1. The worker agent was modified in feat!: remove deprecated features deadline-cloud-worker-agent#277 to remove deprecate command-line arguments including --allow-instance-profile which is used by the test fixtures.
2. Standard output from the deadline-worker-agent was redirected to /dev/null which made forensic analysis challenging

What was the solution? (How)

1. Remove the no-longer-available --allow-instance-profile when launching deadline-worker-agent
2. Redirect standard output to /tmp/worker-agent-stdout.txt

What is the impact of this change?

The worker agent will startup without errors when running tests which use these test fixtures

How was this change tested?

• Ran the build
• E2E tests in progress...

Was this change documented?

No

Is this a breaking change?

No

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