Arm Backend: temp fix for flaky eq op test

[fumchin]

This patch provides a temporary workaround for the flaky op_eq test.

• Add eq_scalar_rank4_randn test to xfail temporarily, and set strict to false
• Change misleading aten_op naming

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218

[pytorch-bot]

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Pull Request Overview

This PR temporarily addresses a flaky eq operator test for the ARM backend.

• Renames misleading operation names from aten_op_BI and aten_op_MI to aten_op_Tensor and aten_op_Scalar respectively.
• Adds an xfail entry for the eq_scalar_rank4_randn test with a clear bug reference and sets strict mode to false to ease test flakiness.

Comments suppressed due to low confidence (2)

backends/arm/test/ops/test_eq.py:144

• [nitpick] The function name test_eq_u85_BI still reflects the old naming convention (BI), even though it now uses aten_op_Tensor. Consider renaming the function (e.g., to test_eq_u85_Tensor) for consistency.

def test_eq_u85_BI(test_module):

backends/arm/test/ops/test_eq.py:141

• Since strict=False is a temporary workaround for the flaky test, consider adding a comment that references the bug ID (MLETORCH-847) or notes that the workaround should be revisited in the future.

strict=False,