* cartographer: bump to 0.3.0

- `vendir` the latest 0.3.0 release from `vmware-tanzu/package-for-cartographer`
- copy smoke tests from 0.2.2 to 0.3.0 (no change in the smoke tests)
Signed-off-by: Ciro S. Costa <ciroscosta@vmware.com>

* tests: run smoke tests for cartographer 0.3.0

with the inclusion of the new 0.3.0 package for cartographer, bump it up
to 0.3.0.
Signed-off-by: Ciro S. Costa <ciroscosta@vmware.com>

* cartographer: consume release contents from tgz

given that the repository where does bits come from
(vmware-tanzu/package-for-cartographer) is aimed towards the generation
of packages for multiple projects targetted at multiple distributions
(e.g., TAP _and_ TCE), now for each projects and distribution, a `.tgz`
is included in the release so that `package.yaml` for each can be
fetched.

note that previous releases (0.2.2) have been updated to conform to the
same pattern.
Signed-off-by: Ciro S. Costa <ciroscosta@vmware.com>