NSKIP015: remaining OOM skip guards (test_largefile, test_zipfile64)

[ppenna]

Summary

Two test modules still carry NSKIP015 skip guards that were not addressed by PR #608. These tests require far more resources than the 128 MB heap / 256 MB VM provides and cannot be enabled without a significantly larger VM configuration.

Remaining skip guards

File	Reason
Lib/test/test_largefile.py	Requires >2 GB disk I/O
Lib/test/test_zipfile64.py	Requires 4 GB+ ZIP entries

Context

PR #608 removed NSKIP015 from five deep-recursion/nesting tests that became passable once the Nanvix OS heap was raised from 64 MB to 128 MB. The two modules listed above are fundamentally different: they require multi-gigabyte allocations or disk space, making them infeasible in the current 256 MB standalone VM.

Acceptance criteria

• Determine if a larger VM configuration (e.g., 1 GB+) will ever be supported
• If yes, re-enable tests under that configuration
• If no, document these as permanent exclusions and close this issue

References

• PR Enable NSKIP015-gated tests now passable with 128 MB heap (#483) #608 (parent work)
• Issue [NSKIP015] OOM — test allocation exceeds available heap #483 (NSKIP015 tracking)
• Issue Nanvix test skip list - Tracking issue #371 (test enablement umbrella)