Refactoring the derivation that fetches all the POMs, JARs,
and AARs in order to make it more generic and easier to extend.
The main change is adding `files` key in `deps.json` which contains
a dict of all the files reletad to given package.
This way we can more easily include other files that might be available
for download, like AARs with ASC suffix, or `nodeps` JARs.
This is also necessary for the React Native upgrade:
https://github.com/status-im/status-mobile/pull/15203
Signed-off-by: Jakub Sokołowski <jakub@status.im>
This handles the usual case where a missing Gradle version causes the
call to `make nix-update-gradle` to fail since call to Gradle also fails.
This is simpler than getting a dev to run commands manually.
Signed-off-by: Jakub Sokołowski <jakub@status.im>