Performance improvements in Decider

[v1r3n]

Pull Request type

• [ ] Bugfix
• [ ] Feature
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes (Please run ./gradlew generateLock saveLock to refresh dependencies)
• [ ] WHOSUSING.md
• [x] Other (please describe): Performance improvements

• Use the workflowModel loaded from the database at the start of the decide() method calls during recursion reducing the number of times workflow is loaded from database.
• Improve check for workflowCompletion reducing the no. of times the tasks are evaluated which can be slow for large workflows
• Add a state inside DeciderOutcome to record if the workflow has a terminal task and capture the task to avoid checking later.
• Reduce and avoid extra recursion for the forks - which has proper nesting of fork/joins now if there are nested forks.
• Enable tests for the test-harness.
• Note: 2 tests which depends on the client changes are marked as @Ignore as they need to be updated with new client changes. These can be re-enabled.

With the above changes we have been able to measure marked performance improvements and reduced CPU load when running large workloads.

NOTE: Please remember to run ./gradlew spotlessApply to fix any format violations.

Changes in this PR

Describe the new behavior from this PR, and why it's needed Issue #

Alternatives considered

Describe alternative implementation you have considered

[aravindanr]

@v1r3n The tests are fixed. You can rebase from main