use debian11-small on Azure KMS task (#2163)

Revert back to using the `debian11-small` distro. The `debian11-latest-small` does not have a new enought `az`.
This is a short-term workaround until DEVPROD-23011 is resolved.

Author: kevinAlbs

.evergreen/generated_configs/legacy-config.yml

@@ -10287,7 +10287,7 @@ buildvariants:
   - .versioned-api .8.0
 - name: testazurekms-variant
   display_name: Azure KMS
-  run_on: debian11-latest-small
+  run_on: debian11-small
   tasks:
   - testazurekms_task_group
   - testazurekms-fail-task

.evergreen/legacy_config_generator/evergreen_config_lib/testazurekms.py

@@ -100,8 +100,8 @@ def _create_variant():
     return Variant(
         name='testazurekms-variant',
         display_name='Azure KMS',
-        # Azure Virtual Machine created is Debian 10.
-        run_on='debian11-latest-small',
+        # Azure Virtual Machine created is Debian 11.
+        run_on='debian11-small', # TODO: switch to 'debian11-latest-small' after DEVPROD-23011 fixed.
         tasks=['testazurekms_task_group', 'testazurekms-fail-task'],
         batchtime=20160,
     )  # Use a batchtime of 14 days as suggested by the CSFLE test README

.evergreen/scripts/compile-test-azurekms.sh

@@ -7,6 +7,16 @@ set -o nounset
 ROOT=$(pwd)
 INSTALL_DIR=$ROOT/install
 
+if [[ "${distro_id:?}" == "debian11-small" ]]; then
+  # Temporary workaround for lack of uv on `debian11`. TODO: remove after DEVPROD-23011 is resolved.
+  uv_dir="$(mktemp -d)"
+  python3 -m virtualenv "${uv_dir:?}"
+  # shellcheck source=/dev/null
+  (. "${uv_dir:?}/bin/activate" && python -m pip install uv)
+  PATH="${uv_dir:?}/bin:${PATH:-}"
+  command -V uv >/dev/null
+fi
+
 . .evergreen/scripts/install-build-tools.sh
 install_build_tools
 export CMAKE_GENERATOR="Ninja"