[Frontend][TFLite] Add TILE operator tests and edge cases

[rknastenka]

This PR adds non-quantized TILE coverage in test_frontend_tflite.py.
Related to #18971

What is included

1. One explicit Expected IR structural test for TILE
2. Parametrized TILE conversion tests covering:

• baseline 2D and higher-rank cases
• identity/no-op tiling
• larger repeat factors
• int32 non-quantized dtype path

Note: SHAPE and RANGE are excluded from this PR and will be handled separately because there's a related a bug in the frontend for them

Validation

pytest test_frontend_tflite.py -v -k "test_tile_ir or test_tile"

[gemini-code-assist]

Code Review

This pull request adds unit tests for the TFLite TILE operator conversion in the Relax frontend. It includes a structural IR check test and a parameterized test covering various input shapes and data types. I have no feedback to provide.

[tlopex]

LGTM