Make LinearHostIrTest.HostIrLinearOut less flaky

[wujingyue]

This had been broken consistently in CI although I couldn't reproduce the error. This PR seems to be able to fix it

[wujingyue]

!test

[github-actions]

Description

• Replace random float tensors with random integer tensors

• Improve test stability for HostIrLinearOut

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Changes walkthrough 📝

	Relevant files
Enhancement	test_host_irs.cpp Replace random floats with integers in test                            tests/cpp/test_host_irs.cpp Changed at::randn to at::randint for input tensors Set random integer range to 5 for consistency +3/-3

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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 Randomness Consistency The use of randint with a fixed range (0-4) might not provide the same level of randomness as randn, which could affect the test's ability to catch certain edge cases or bugs. auto in_at = at::randint(5, {B, M, K}, options); auto weight_at = at::randint(5, {N, K}, options); auto bias_at = at::randint(5, {N}, options);