Increase memory allocated for inputs in case semi hosting is used. (#5309)

Summary:
Enable E2E MNV2 unit test

Pull Request resolved: https://github.com/pytorch/executorch/pull/5309

Reviewed By: mcr229

Differential Revision: D62582648

Pulled By: digantdesai

fbshipit-source-id: efa4b4f399cf6dee8e87ecfdc9885628c2c0e275