With autoconf this option controlled if the test suite is compiled by
default or not with the fact that it will be compiled later when
running `make check`.
With meson it is not possible to compile it later when running
`ninja test` as it will be always compiled if referenced by `test()`
function in meson.build files.
Since we cannot postpone compilation of the test suite drop this option
as it will not be converted to meson.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com> Reviewed-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: Neal Gompa <ngompa13@gmail.com>