fix: asset compute integration test workflow not detecting a successful run

[shazron]

Changes

• Successful deployment grep check removed, there are no deploys in this test - not sure how it passed before
• Running tests in test/asset-compute/worker grep check modified to use a wildcard for the start of the path - the output contains the full path now
• Removed unused ffapp folder check (remnant for when it was part of another workflow)

How Has This Been Tested?

• this is the test when it runs daily or on demand
• tested locally on https://github.com/adobe/asset-compute-integration-tests

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.