Support cargo sparce registries with authentication

[dtretyakov]

Cargo team introduced space registry protocol which will replace git index in future.
As of now they have space-registry and registry-auth features which allows using them in nightly toolchain.

In TeamCity it will be great to check support of such setup and ensure that cargo login build feature works as expected.

Reference: rust-lang/cargo#9069

[dtretyakov]

The protocol is supported in JetBrains Space Packages and cargo.io also will receive sparce index support.