0.43.0-rc3

fix(userspace)!: show source config path only in debug builds

Starting from Falco 0.40, the `falco --help` output incorrectly showed
the source config path (e.g., /home/runner/work/falco/falco/falco.yaml)
in release packages. This path was intended only for local development.

The issue was introduced when RelWithDebInfo build type support was
added (commit 6bf33ff). The existing code checked for BUILD_TYPE_RELEASE
to determine release behavior, but RelWithDebInfo builds defined
BUILD_TYPE_RELWITHDEBINFO instead, causing them to fall into the
debug code path.

This fix introduces BUILD_TYPE_DEBUG and changes the conditionals to
enable dev features only when CMAKE_BUILD_TYPE is explicitly "debug".
Both Release and RelWithDebInfo builds now correctly show only
/etc/falco/falco.yaml.

Fixes the regression introduced in 0.40.0

Signed-off-by: Leonardo Grasso <[email protected]>

Signed-off-by: Leonardo Di Giovanna <[email protected]>