[fix] Adjust logic for applying outcome for IF_ELSE_CONDITION tasks

[mikita-sakalouski]

Description

1. Add check that outcome is applied on correct task from dependencies
2. Get correct outcome based on task key and not just first one

Related Issue

#172 #171

Motivation and Context

Get correct behavior

How Has This Been Tested?

Added more tasks into sample workflow for testing

Screenshots (if appropriate):

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:

• 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.

[mikita-sakalouski]

Depends on #168 . Please firstly review and merge PR #168

[newfront]

@mikita-sakalouski There is a small fix that could simplify the block on engine/task.py - see my comment where we could remove the closing block since the yield {task_name: outcome} is the same on either side of the condition.

Otherwise this looks good to ship.

[pariksheet]

LGTM