disable qbits lib import when using gpu version itrex

[zhewang1-intc]

Type of Change

feature or bug fix or documentation or others: bug fix
API changed or not: no

Description

detail description

GPU version itrex will not build qbits.so but try to import it in qbits/init.py, this pr target to fix this bug.

JIRA ticket: xxx

Expected Behavior & Potential Risk

the expected behavior that triggered by this PR

How has this PR been tested?

how to reproduce the test (including hardware information)

Dependency Change?

any library dependency introduced or removed: NO

[github-actions]

⚡ Required checks status: All passing 🟢

Groups summary

🟢 Format Scan Tests workflow

Check ID	Status	Error details
format-scan (pylint)	success		✅
format-scan (bandit)	success		✅
format-scan (cloc)	success		✅
format-scan (cpplint)	success		✅

These checks are required after the changes to intel_extension_for_transformers/qbits/__init__.py.

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Thank you for your contribution! 💜

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