remove redundant cast in a test

[liqiangxl]

I was wondering why there is an additional no op scheduler when the input data is float32. It turns out due to the redundant cast, we only need the cast when the input is float16.
This PR removes that cast for fp32.

[github-actions]

Review updated until commit b909282

Description

• Removed redundant cast operations for float32 input.

• Updated maybeCastOp usage for input, weight, bias, and output tensors.

• Simplified test assertions by removing unnecessary checks for float32.

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Changes walkthrough 📝

	Relevant files
Enhancement	test_persistent_buffer.cpp Simplify cast operations and test assertions                          tests/cpp/test_persistent_buffer.cpp Replaced redundant castOp with maybeCastOp for input, weight, bias, and output tensors. Simplified test assertions by removing checks for float32 no-op scheduler. +15/-23

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PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

🧪 PR contains tests

⚡ Recommended focus areas for review Scheduler Check The PR removes the redundant cast for float32 but also modifies the scheduler check. Ensure that the scheduler check is still valid and that removing the NoOp scheduler does not affect the performance or correctness for float32 inputs. EXPECT_THAT( runtime->fusionSegments()->groups(), UnorderedElementsAre(HeuristicIs(SchedulerType::InnerPersistent))); Fusion* scheduled_fusion = runtime->executors()

[liqiangxl]

!build

[wujingyue]

There's a maybeCastOp that may save you some typing.

[liqiangxl]

!build

[liqiangxl]

!build

[liqiangxl]

!test