Replace maximize-build-space action

[jayqi]

The easimon/maximize-build-space action is a victim of GitHub changing stuff about how the runners are set up. A lot of the functionality is broken, and this affects us because root-reserve-mb doesn't work anymore.

• https://github.com/easimon/maximize-build-space/issues/44
• https://github.com/easimon/maximize-build-space/issues/48

This PR replaces the action with some sudo rm -rf commands that just duplicate what the action was doing for the parts where it deletes unwanted software.

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.4%. Comparing base (17f8db9) to head (3717380).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #336 +/- ## ====================================== Coverage 87.4% 87.4% ====================================== Files 26 26 Lines 2191 2191 ====================================== Hits 1915 1915 Misses 276 276 ```