ci: run the enterprise package suite in GitHub Actions (#37798)

tests/enterprise is 13 files and 244 tests that only CircleCI runs, and CircleCI
gates nothing: it triggers on PR labeled events, none of its jobs are required,
and red runs get merged past. So the suite that covers the enterprise package's
guardrails, auth and management endpoints has had no say in whether a change
lands.

Measured on 2026-08-21 with every credential stripped from the environment: 240
passed, 4 skipped, nothing failed. It needs no provider key, so it can be a
required shard rather than a scheduled lane, unlike the other CircleCI suites in
this group, which each carry a live-API minority.

The CircleCI job is removed in the same commit so the suite runs once, not twice.

.circleci/config.yml

@@ -1154,40 +1154,6 @@ jobs:
           paths:
             - search_coverage.xml
             - search_coverage
-  litellm_mapped_enterprise_tests:
-    docker:
-      - *python312_image
-    working_directory: ~/project
-    resource_class: large
-
-    steps:
-      - checkout
-      - skip_if_unrelated_changes
-      - setup_google_dns
-      - install_uv
-      - install_rust
-      - run:
-          name: Install Dependencies
-          command: |
-            uv sync --frozen --all-groups --all-extras --python 3.12
-      - setup_litellm_enterprise_pip
-      - run:
-          name: Run enterprise tests
-          command: |
-            uv run --no-sync python -m prisma generate
-            mkdir -p test-results
-            TEST_FILES=$(circleci tests glob "tests/enterprise/**/test_*.py")
-            echo "$TEST_FILES" | circleci tests run \
-              --verbose \
-              --command="tr ' ' '\\n' | awk '/\\.py/ {print; next} {sub(/\\.[A-Z][^.]*$/, \"\"); gsub(/\\./, \"/\"); print \$0 \".py\"}' | xargs uv run --no-sync python -m pytest \
-                -v -x \
-                --junitxml=test-results/junit-enterprise.xml \
-                --durations=10 \
-                -n 4"
-          no_output_timeout: 15m
-      # Store test results
-      - store_test_results:
-          path: test-results
   batches_testing:
     docker:
       - *python312_image
@@ -3041,8 +3007,6 @@ workflows:
           filters: *main_branches
       - search_testing:
           filters: *main_branches
-      - litellm_mapped_enterprise_tests:
-          filters: *main_branches
       - batches_testing:
           filters: *main_branches
       - litellm_utils_testing:
@@ -3065,7 +3029,6 @@ workflows:
             - guardrails_testing
             - ocr_testing
             - search_testing
-            - litellm_mapped_enterprise_tests
             - batches_testing
             - litellm_utils_testing
             - pass_through_unit_testing

.github/workflows/test-unit.yml

@@ -221,6 +221,14 @@ jobs:
             timeout-minutes: 20
             job-timeout-minutes: 55
 
+          - shard: enterprise-package
+            artifact-name: enterprise-package
+            test-path: "tests/enterprise"
+            workers: 4
+            reruns: 2
+            timeout-minutes: 20
+            job-timeout-minutes: 55
+
           - shard: responses-caching-types
             artifact-name: responses-caching-types
             test-path: >-