Arm backend: Refactor Ops Tests for AvgPool, Clamp, Clone, Conv1d, Sub (#9039)

Refactored multiple operator test files:
- Replaced `@parameterized.expand` with `@common.parametrize`.
- Removed `_test_*_pipeline()` functions and replaced them with
`TosaPipelineMI` and `TosaPipelineBI`.
- Fixed padding handling for max pooling and avg pooling.
- Updated pipeline infrastructure to simplify replacing the default
quantize stage.

Signed-off-by: Fang-Ching <Fang-Ching.Chen@arm.com>