fixes #8450 -- enable sparse registry everywhere

Author: alex

.github/workflows/ci.yml

@@ -16,6 +16,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
   cancel-in-progress: true
 
+env:
+  CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
+
 jobs:
   linux:
     runs-on: ubuntu-latest
@@ -45,8 +48,6 @@ jobs:
           - {VERSION: "3.11", TOXENV: "py311", OPENSSL: {TYPE: "openssl", VERSION: "03fa5127ded6ba0dc9f178090eca0dbe70769c0e"}}
     name: "${{ matrix.PYTHON.TOXENV }} ${{ matrix.PYTHON.OPENSSL.TYPE }} ${{ matrix.PYTHON.OPENSSL.VERSION }} ${{ matrix.PYTHON.TOXARGS }} ${{ matrix.PYTHON.OPENSSL.CONFIG_FLAGS }}"
     timeout-minutes: 15
-    env:
-      CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
     steps:
       - uses: actions/[email protected]
         timeout-minutes: 3
@@ -147,8 +148,6 @@ jobs:
           - {IMAGE: "ubuntu-jammy:aarch64", TOXENV: "py310", RUNNER: [self-hosted, Linux, ARM64]}
           - {IMAGE: "alpine:aarch64", TOXENV: "py310", RUNNER: [self-hosted, Linux, ARM64]}
     timeout-minutes: 15
-    env:
-      CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
     steps:
       - name: Ridiculous alpine workaround for actions support on arm64
         run: |
@@ -269,8 +268,6 @@ jobs:
           - nightly
     name: "Rust Coverage"
     timeout-minutes: 15
-    env:
-      CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
     steps:
       - uses: actions/[email protected]
         timeout-minutes: 3
@@ -451,8 +448,6 @@ jobs:
         JOB_NUMBER: [0, 1]
     name: "${{ matrix.PYTHON.TOXENV }} on ${{ matrix.WINDOWS.WINDOWS }} (part ${{ matrix.JOB_NUMBER }})"
     timeout-minutes: 15
-    env:
-      CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
     steps:
       - uses: actions/[email protected]
         timeout-minutes: 3
@@ -527,8 +522,6 @@ jobs:
           - '3.11'
     name: "Downstream tests for ${{ matrix.DOWNSTREAM }}"
     timeout-minutes: 15
-    env:
-      CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
     steps:
       - uses: actions/[email protected]
         timeout-minutes: 3
@@ -572,8 +565,6 @@ jobs:
     runs-on: ubuntu-latest
     name: "linkcheck"
     timeout-minutes: 10
-    env:
-      CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
     steps:
       - uses: actions/[email protected]
         with: