fix(test): update fuseMaxNameLen on Linux to match newer kernel limits

[geertj]

The Linux kernel (since commit 27992ef8077) increased FUSE_NAME_MAX to PATH_MAX (4096). Updating the test constant to match this behavior allows the kernel to catch the illegal name length and return the expected ENAMETOOLONG error instead of passing it to GCSFuse.

[gemini-code-assist]

Summary of Changes

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This pull request updates a test constant to reflect changes in recent Linux kernel versions regarding FUSE name length limits. By increasing the limit to 4096, the test suite can correctly validate that the kernel handles illegal name lengths by returning an ENAMETOOLONG error, ensuring consistent behavior between the kernel and GCSFuse.

Highlights

• Test Constant Update: Updated the fuseMaxNameLen constant for Linux environments from 1024 to 4096.
• Kernel Compatibility: Aligned the test configuration with recent Linux kernel changes that increased FUSE_NAME_MAX to PATH_MAX.

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[gemini-code-assist]

Code Review

This pull request updates the fuseMaxNameLen constant for Linux from 1024 to 4096 to match newer Linux kernel FUSE limits. However, this change will cause the LegalNames test to fail because Google Cloud Storage (GCS) has a strict maximum object name limit of 1024 bytes. It is recommended to decouple the FUSE kernel limit from the GCS maximum legal name limit in the tests, for example by using min(fuseMaxNameLen, 1024).