Support compressed Bytestream transfers for remote execution

[bergsieker]

Description of the problem / feature request:

The RE API is close to finalizing support for API-level compression on Bytestream (bazelbuild/remote-apis#168). Using compression is optional, but Bazel should support it at some point.

Feature requests: what underlying problem are you trying to solve with this feature?

Remote builds can use significant bandwidth. Compression reduces the bandwidth used, which can also lead to significant performance improvements for bandwidth-constrained network connections.

What operating system are you running Bazel on?

This applies to all operating systems that Bazel supports.

[bergsieker]

Assigning to Philipp for triage and prioritization.

[philwo]

@coeuvre Could you have a look and apply a P-label that you deem correct? :)

Quick guidance:

• P0: This is an emergency and more important than other current work. (Assignee required)
• P1: I'll work on this now. (Assignee required)
• P2: We'll consider to work on this in future. (Assignee optional)
• P3: We're not considering to work on this, but happy to review a PR. (No assignee)
• P4: This is probably out of scope and will be closed soon. (No assignee)

[coeuvre]

Thanks. I am happy to implement this.

[chancila]

any movement on this feature?

[philwo]

@chancila Thanks for checking in! I actually just this week thought of it and have found a colleague who would like to implement it :) We'll follow up with details here soon.

[coeuvre]

Closing since this is implemented by #14041.