PYTHON-5233 Allow python version to be set at the task level (#2228)

Author: blink1073

.evergreen/config.yml

@@ -206,7 +206,7 @@ functions:
       params:
         binary: bash
         working_dir: "src"
-        include_expansions_in_env: [VERSION, TOPOLOGY, AUTH, SSL, ORCHESTRATION_FILE, PYTHON_BINARY,
+        include_expansions_in_env: [VERSION, TOPOLOGY, AUTH, SSL, ORCHESTRATION_FILE, PYTHON_BINARY, PYTHON_VERSION,
           STORAGE_ENGINE, REQUIRE_API_VERSION, DRIVERS_TOOLS, TEST_CRYPT_SHARED, AUTH_AWS, LOAD_BALANCER]
         args: [.evergreen/just.sh, run-server, "${TEST_NAME}"]
     - command: expansions.update
@@ -227,7 +227,7 @@ functions:
       type: test
       params:
         include_expansions_in_env: [AUTH, SSL, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY,
-          AWS_SESSION_TOKEN, COVERAGE, PYTHON_BINARY, LIBMONGOCRYPT_URL, MONGODB_URI,
+          AWS_SESSION_TOKEN, COVERAGE, PYTHON_BINARY, LIBMONGOCRYPT_URL, MONGODB_URI, PYTHON_VERSION,
           DISABLE_TEST_COMMANDS, GREEN_FRAMEWORK, NO_EXT, COMPRESSORS, MONGODB_API_VERSION, DEBUG_LOG,
           ORCHESTRATION_FILE, OCSP_SERVER_TYPE]
         binary: bash

.evergreen/generated_configs/tasks.yml

@@ -723,18 +723,48 @@ tasks:
     tags: [doctests]
 
   # Enterprise auth tests
-  - name: test-enterprise-auth
+  - name: test-enterprise-auth-python3.9
     commands:
       - func: run server
         vars:
           TEST_NAME: enterprise_auth
           AUTH: auth
+          PYTHON_VERSION: "3.9"
       - func: assume ec2 role
       - func: run tests
         vars:
           TEST_NAME: enterprise_auth
           AUTH: auth
+          PYTHON_VERSION: "3.9"
     tags: [enterprise_auth]
+  - name: test-enterprise-auth-python3.13
+    commands:
+      - func: run server
+        vars:
+          TEST_NAME: enterprise_auth
+          AUTH: auth
+          PYTHON_VERSION: "3.13"
+      - func: assume ec2 role
+      - func: run tests
+        vars:
+          TEST_NAME: enterprise_auth
+          AUTH: auth
+          PYTHON_VERSION: "3.13"
+    tags: [enterprise_auth]
+  - name: test-enterprise-auth-pypy3.10
+    commands:
+      - func: run server
+        vars:
+          TEST_NAME: enterprise_auth
+          AUTH: auth
+          PYTHON_VERSION: pypy3.10
+      - func: assume ec2 role
+      - func: run tests
+        vars:
+          TEST_NAME: enterprise_auth
+          AUTH: auth
+          PYTHON_VERSION: pypy3.10
+    tags: [enterprise_auth, pypy]
 
   # Free threading tests
   - name: test-free-threading

.evergreen/generated_configs/variants.yml

@@ -507,54 +507,24 @@ buildvariants:
     tags: [encryption_tag]
 
   # Enterprise auth tests
-  - name: auth-enterprise-macos-python3.9
+  - name: auth-enterprise-macos
     tasks:
-      - name: .enterprise_auth
-    display_name: Auth Enterprise macOS Python3.9
+      - name: .enterprise_auth !.pypy
+    display_name: Auth Enterprise macOS
     run_on:
       - macos-14
-    expansions:
-      PYTHON_BINARY: /Library/Frameworks/Python.Framework/Versions/3.9/bin/python3
-  - name: auth-enterprise-rhel8-python3.10
-    tasks:
-      - name: .enterprise_auth
-    display_name: Auth Enterprise RHEL8 Python3.10
-    run_on:
-      - rhel87-small
-    expansions:
-      PYTHON_BINARY: /opt/python/3.10/bin/python3
-  - name: auth-enterprise-rhel8-python3.11
-    tasks:
-      - name: .enterprise_auth
-    display_name: Auth Enterprise RHEL8 Python3.11
-    run_on:
-      - rhel87-small
-    expansions:
-      PYTHON_BINARY: /opt/python/3.11/bin/python3
-  - name: auth-enterprise-rhel8-python3.12
+  - name: auth-enterprise-win64
     tasks:
-      - name: .enterprise_auth
-    display_name: Auth Enterprise RHEL8 Python3.12
-    run_on:
-      - rhel87-small
-    expansions:
-      PYTHON_BINARY: /opt/python/3.12/bin/python3
-  - name: auth-enterprise-win64-python3.13
-    tasks:
-      - name: .enterprise_auth
-    display_name: Auth Enterprise Win64 Python3.13
+      - name: .enterprise_auth !.pypy
+    display_name: Auth Enterprise Win64
     run_on:
       - windows-64-vsMulti-small
-    expansions:
-      PYTHON_BINARY: C:/python/Python313/python.exe
-  - name: auth-enterprise-rhel8-pypy3.10
+  - name: auth-enterprise-rhel8
     tasks:
       - name: .enterprise_auth
-    display_name: Auth Enterprise RHEL8 PyPy3.10
+    display_name: Auth Enterprise RHEL8
     run_on:
       - rhel87-small
-    expansions:
-      PYTHON_BINARY: /opt/python/pypy3.10/bin/python3
 
   # Free threaded tests
   - name: free-threaded-rhel8-python3.13t