chore(driver): properly use strscpy.

[FedeDP]

What type of PR is this?

/kind cleanup

Any specific area of the project related to this PR?

/area driver-kmod

Does this PR require a change in the driver versions?

/version driver-API-version-patch

What this PR does / why we need it:

This PR adapts kmod code to use strscpy in place of strlcpy in kernels where strscpy is available (ie: since 4.3.0: torvalds/linux@30035e4).
strscpy is safer and has better results; moreover, strlcpy is being sunsetted (https://lore.kernel.org/lkml/202401191311.B6AA79D@keescook/ in kernel 6.8 for the full removal, but the effort to drop it from all drivers did .start quite a while ago).
See https://lwn.net/Articles/659214/ and strscpy code: https://elixir.bootlin.com/linux/latest/source/lib/string.c#L122

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[FedeDP]

/milestone next-driver

[FedeDP]

This also fixes build against v6.8-rc1: https://github.com/falcosecurity/libs/actions/runs/7622725910/job/20761330947

[FedeDP]

rc3 still fixed ;)

[FedeDP]

Still good against linux 6.8-rc5: https://github.com/falcosecurity/libs/actions/runs/7622725910

[FedeDP]

Testing against rc6: https://github.com/falcosecurity/libs/actions/runs/8064072897 🟢

[Andreagit97]

/approve

[Andreagit97]

i think you need to rebase to remove the stale required jobs

[FedeDP]

You are right! Rebased!

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

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

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