simplify: remove Dev Drive, keep Defender-disable only

Dev Drive caused cache invalidation issues and didn't improve times
when the cargo target cache was warm. The simpler Defender-disable
approach (Set-MpPreference) was already effective at ~6min.

Changes:
- ci.yml: Remove setup-dev-drive from Test and CLI E2E Windows jobs
- ci.yml: Keep Defender disable (already proven)
- e2e-test.yml: Keep new Defender disable additions (unchanged)

Author: fengmk2

.github/workflows/ci.yml

@@ -76,18 +76,6 @@ jobs:
         shell: powershell
         run: Set-MpPreference -DisableRealtimeMonitoring $true
 
-      # Use Dev Drive with ReFS for CARGO_HOME/RUSTUP_HOME on Windows
-      # Only cargo/rustup dirs go on the Dev Drive (no workspace-copy) to preserve target dir cache
-      - name: Setup Dev Drive
-        uses: samypr100/setup-dev-drive@30f0f98ae5636b2b6501e181dfb3631b9974818d # v4.0.0
-        if: runner.os == 'Windows'
-        with:
-          drive-size: 8GB
-          drive-format: ReFS
-          env-mapping: |
-            CARGO_HOME,{{ DEV_DRIVE }}/.cargo
-            RUSTUP_HOME,{{ DEV_DRIVE }}/.rustup
-
       - uses: oxc-project/setup-rust@d286d43bc1f606abbd98096666ff8be68c8d5f57 # v1.0.0
         with:
           save-cache: ${{ github.ref_name == 'main' }}
@@ -210,17 +198,6 @@ jobs:
         shell: powershell
         run: Set-MpPreference -DisableRealtimeMonitoring $true
 
-      # Use Dev Drive with ReFS for CARGO_HOME/RUSTUP_HOME on Windows
-      - name: Setup Dev Drive
-        uses: samypr100/setup-dev-drive@30f0f98ae5636b2b6501e181dfb3631b9974818d # v4.0.0
-        if: runner.os == 'Windows'
-        with:
-          drive-size: 8GB
-          drive-format: ReFS
-          env-mapping: |
-            CARGO_HOME,{{ DEV_DRIVE }}/.cargo
-            RUSTUP_HOME,{{ DEV_DRIVE }}/.rustup
-
       - run: |
           brew install rustup
           rustup install stable