testing/cyclone: use a versioned provides for cyclone-bootstrap

Cyclone upstream does not support building new releases with the previously released version. For example, when version 0.36.0 is released it will not be officially supported to compile this version with a 0.35.0 Cyclone compiler. Instead, one has to re-bootstrap from the pre-compiled C provided for version 0.36.0 using cyclone-stage0.

I previously thought that this is can not be expressed using abuild version constraints (see 53608690). However, it turns out that this is actually possible to express by using a versioned $provides for cyclone-bootstrap and adding a version constraint to $depends in testing/cyclone. With this patch applied, the apk dependency solver will/should consider the cyclone-bootstrap $provides version first and only on version match consult the $provider_priority.