Add kernel module check

[rgayon]

Currently, only checking for nbd (for mountinc QCOW images).

Fixes #61

[codecov]

Codecov Report

❌ Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
openrelik_worker_common/mount_utils.py	71.42%	2 Missing ⚠️

Files with missing lines	Coverage Δ
openrelik_worker_common/mount_utils.py	89.71% <71.42%> (-0.62%)	⬇️

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[hacktobeer]

PTAL