Free runner disk space before building wheels

The cibuildwheel container shares the runner's 72G root filesystem, and
the Rust target dir, the in-container rustup toolchains, and the manylinux
image together exhaust it before the wheel test install runs. Dropping the
unused Android/dotnet/GHC/Swift toolchains takes free space from 7G to 30G.

Verified on 1kbgz/crowdsource-admin, which was failing with
'OSError: [Errno 28] No space left on device'.

Signed-off-by: Tim Paine <3105306+timkpaine@users.noreply.github.com>

Author: timkpaine

rust/.github/workflows/build.yaml.jinja

@@ -83,6 +83,13 @@ jobs:
         platforms: all
       if: runner.os == 'Linux' && runner.arch == 'X64'
 
+    - name: Free disk space
+      run: |
+        sudo rm -rf /usr/local/lib/android /usr/share/dotnet /opt/ghc /usr/local/.ghcup /usr/share/swift
+        df -h /
+      shell: bash
+      if: matrix.os == 'ubuntu-latest'
+
     - name: Make dist (Linux)
       run: |
         rm -rf dist

rustjswasm/.github/workflows/build.yaml.jinja

@@ -89,6 +89,13 @@ jobs:
         platforms: all
       if: runner.os == 'Linux' && runner.arch == 'X64'
 
+    - name: Free disk space
+      run: |
+        sudo rm -rf /usr/local/lib/android /usr/share/dotnet /opt/ghc /usr/local/.ghcup /usr/share/swift
+        df -h /
+      shell: bash
+      if: matrix.os == 'ubuntu-latest'
+
     - name: Make dist (Linux)
       run: |
         rm -rf dist