fix: add support for numpy scaler types in type_engine

[techytushar]

TL;DR

Fixes: https://github.com/flyteorg/flyte/issues/2753

Added support for numpy scaler types in the type_engine.py file

Type

• [x] Bug Fix
• [ ] Feature
• [ ] Plugin

Are all requirements met?

• [x] Code completed
• [ ] Smoke tested
• [ ] Unit tests added
• [ ] Code documentation added
• [ ] Any pending items have an associated Issue

Complete description

How did you fix the bug, make the feature etc. Link to any design docs etc

• Updated the SimpleTransformer class to take tuples of types instead of single type, so int transformer now supports both int and numpy.integer
• Also updated the type checking methods to use isInstance instead of exact type matches

Tracking Issue

https://github.com/flyteorg/flyte/issues/2753

Follow-up issue

NA

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[samhita-alla]

@techytushar, could you fix the error and add a test?

[techytushar]

Accidently closed this PR, have opened a new one with added tests https://github.com/flyteorg/flytekit/pull/1258