Summary:

This is a first part of a series of diff needed to enable G. Configuration Cache:
https://docs.gradle.org/current/userguide/configuration_cache.html
as it will make our CI faster (and will be the default in the future Gradle version).

Here I'm making all those tasks `prepare*` CC friendly.

Those tasks were not CC friendly as they were referencing an external variable inside their body.
We don't need to know the library version, we can just substring after the first folder
and the tasks will behave as before.

Changelog:
[Internal] [Changed] -

Differential Revision: D69655168

Summary:
This is the second part of a series of diff needed to enable G. Configuration Cache:
https://docs.gradle.org/current/userguide/configuration_cache.html
as it will make our CI faster (and will be the default in the future Gradle version).

Here I'm making the exec tasks CC friendly.

The problem is that previously we were using explicit streams which are not CC friendly
for stderr/stdout. The solution is to create a custom task and handle files as input
properties.

Changelog:
[Internal] [Changed] -

Differential Revision: D69662246

Summary:
This is the next part of a series of diff needed to enable G. Configuration Cache:
https://docs.gradle.org/current/userguide/configuration_cache.html
as it will make our CI faster (and will be the default in the future Gradle version).

Here I'm removing the `onlyIf` lambdas to make some tasks CC friendly.

The problem is that some `onlyIf` lambdas can't easily be serialized. Here I'm cleaning up
the problematic one to move the condition checks at execution time

Changelog:
[Internal] [Changed] -

Differential Revision: D69664732