Fix local running of backcompat tests after we switched to UV (apache#48669)

We were including a real `airflow/__init__.py` which has the unfortunate
side-effect of making `AIRFLOW_V_3_0_PLUS` find 3.0.0dev0 as the version!
Oops. The fix for that is to mount an empyt init file instead (we need a file
to keep the uv build etc happy)

Also uninstall edge provider for 2.9, as that needs 2.10.

Oh and volume mount devel-common as that is part of test code.

Author: ashb

scripts/ci/docker-compose/providers-and-tests-sources.yml

@@ -29,11 +29,13 @@ services:
       # Remove airflow sources from container
       - ../../../empty:/opt/airflow/airflow-core/src
       # But keep airflow/__init__.py to make hatchling happy when building empty package
-      - ../../../airflow-core/src/airflow/__init__.py:/opt/airflow/airflow-core/src/airflow/__init__.py
+      - /dev/null:/opt/airflow/airflow-core/src/airflow/__init__.py
       # Remove task-sdk sources from container
       - ../../../empty:/opt/airflow/task-sdk/src
       # But keep task-sdk/a__init__.py to make hatchling happy when building empty package
-      - ../../../task-sdk/src/airflow/sdk/__init__.py:/opt/airflow/task-sdk/src/airflow/sdk/__init__.py
+      - /dev/null:/opt/airflow/task-sdk/src/airflow/sdk/__init__.py
+
+      - ../../../devel-common:/opt/airflow/devel-common
       # And keep tests
       - ../../../airflow-core/tests/:/opt/airflow/airflow-core/tests:cached
       # Mount providers to make sure that we have the latest providers - both tests and sources

scripts/in_container/install_airflow_and_providers.py

@@ -796,6 +796,8 @@ def install_airflow_and_providers(
                 "apache-airflow-providers-common-messaging",
                 "apache-airflow-providers-git",
             ]
+            if version.minor < 10:
+                providers_to_uninstall_for_airflow_2.append("apache-airflow-providers-edge")
             run_command(
                 ["uv", "pip", "uninstall", *providers_to_uninstall_for_airflow_2],
                 github_actions=github_actions,