fix(output): do not print syscall_buffer_size when gvisor is enabled

[alacuku]

Signed-off-by: Aldo Lacuku aldo@lacuku.eu

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What this PR does / why we need it:

Avoid printing the syscall_buffer_size when gvisor is enabled.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[FedeDP]

/approve

[poiana]

LGTM label has been added.

Git tree hash: af5d5a2bcbe1c2d0c101b9440f5792acafaa84fc

[Andreagit97]

/approve

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alacuku, Andreagit97, FedeDP

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