Fix: strlcpy removed in linux 6.8.0-rc1

Fix: strlcpy removed in linux 6.8.0-rc1

See upstream commit:

    commit d26270061ae66b915138af7cd73ca6f8b85e6b44
    Author: Kees Cook <keescook@chromium.org>
    Date:   Thu Jan 18 12:31:55 2024 -0800

        string: Remove strlcpy()

        With all the users of strlcpy() removed[1] from the kernel, remove the
        API, self-tests, and other references. Leave mentions in Documentation
        (about its deprecation), and in checkpatch.pl (to help migrate host-only
        tools/ usage). Long live strscpy().

The replacement interface, `strscpy`, has been available since linux
4.3, introduced in the upstream commit
30c44659f4a3e7e1f9f47e895591b4b40bf62671.

As lttng-modules master branch targets linux 4.4+ at this time,
`strlcpy` can be replaced with `strscpy`.

Change-Id: I27cdff70a504b25340cc59150ed8e959d9629e43
Signed-off-by: Kienan Stewart <kstewart@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>