Clean up disk space in CI before running

[jakebailey]

Our build cache is not small anymore. And if you happen to modify one of the root packages like core or ast, it can end up being unused.

The GHA linux runners only start with a little bit of disk space, and don't even have /tmp.

Use an action to delete stuff off of the runner before we do anything:

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=> Android library: Saved 12GiB
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=> Haskell runtime: Saved 6.2GiB
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[Copilot]

Pull Request Overview

This PR adds disk space cleanup steps to GitHub Actions workflows to prevent build failures on Linux runners that have limited disk space. The cleanup action removes unused Android libraries, .NET runtime, and Haskell runtime to free up approximately 22GB of space before the build cache is utilized.

Key Changes

• Added jlumbroso/free-disk-space action to three workflow files before other steps execute
• Configured the action to remove tool caches while preserving large packages, Docker images, and swap storage
• Applied consistently across CI, cache creation, and Copilot setup workflows

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
.github/workflows/create-cache.yml	Added disk space cleanup before cache creation steps
.github/workflows/copilot-setup-steps.yml	Added disk space cleanup before Copilot setup and checkout
.github/workflows/ci.yml	Added disk space cleanup before CI workflow execution