Fix constraints generation scripts. (#18094)

We are now generatnung constraints with better description, and
we include information about DEFAULT_BRANCH (main/v2-1-test etc.)

The scripts to generate the constraints need to get teh variable
passed to docker.

Also names of generated files were wrong. The constraints did
not update the right constraint files.

(cherry picked from commit afd4ba6)

scripts/ci/docker-compose/_docker.env

@@ -26,6 +26,7 @@ CI_TARGET_REPO
 CI_TARGET_BRANCH
 COMMIT_SHA
 DB_RESET
+DEFAULT_BRANCH
 DEFAULT_CONSTRAINTS_BRANCH
 ENABLED_INTEGRATIONS
 ENABLED_SYSTEMS

scripts/in_container/run_generate_constraints.sh

@@ -21,14 +21,13 @@
 CONSTRAINTS_DIR="/files/constraints-${PYTHON_MAJOR_MINOR_VERSION}"
 
 LATEST_CONSTRAINT_FILE="${CONSTRAINTS_DIR}/original-${AIRFLOW_CONSTRAINTS}-${PYTHON_MAJOR_MINOR_VERSION}.txt"
-CURRENT_CONSTRAINT_FILE="${CONSTRAINTS_DIR}/${AIRFLOW_CONSTRAINTS}-${PYTHON_MAJOR_MINOR_VERSION}.txt"
-
 mkdir -pv "${CONSTRAINTS_DIR}"
 
 
 if [[ ${GENERATE_CONSTRAINTS_MODE} == "no-providers" ]]; then
     AIRFLOW_CONSTRAINTS="constraints-no-providers"
     NO_PROVIDERS_EXTRAS=$(python -c 'import setup; print(",".join(setup.CORE_EXTRAS_REQUIREMENTS.keys()))')
+    CURRENT_CONSTRAINT_FILE="${CONSTRAINTS_DIR}/${AIRFLOW_CONSTRAINTS}-${PYTHON_MAJOR_MINOR_VERSION}.txt"
     echo
     echo "UnInstall All PIP packages."
     echo
@@ -50,6 +49,7 @@ if [[ ${GENERATE_CONSTRAINTS_MODE} == "no-providers" ]]; then
 EOF
 elif [[ ${GENERATE_CONSTRAINTS_MODE} == "source-providers" ]]; then
     AIRFLOW_CONSTRAINTS="constraints-source-providers"
+    CURRENT_CONSTRAINT_FILE="${CONSTRAINTS_DIR}/${AIRFLOW_CONSTRAINTS}-${PYTHON_MAJOR_MINOR_VERSION}.txt"
     echo
     echo "Providers are already installed from sources."
     echo
@@ -67,11 +67,11 @@ elif [[ ${GENERATE_CONSTRAINTS_MODE} == "source-providers" ]]; then
 EOF
 elif [[ ${GENERATE_CONSTRAINTS_MODE} == "pypi-providers" ]]; then
     AIRFLOW_CONSTRAINTS="constraints"
+    CURRENT_CONSTRAINT_FILE="${CONSTRAINTS_DIR}/${AIRFLOW_CONSTRAINTS}-${PYTHON_MAJOR_MINOR_VERSION}.txt"
     echo
     echo "Install all providers from PyPI so that they are included in the constraints."
     echo
     install_all_providers_from_pypi_with_eager_upgrade
-else
     cat <<EOF >"${CURRENT_CONSTRAINT_FILE}"
 #
 # This constraints file was automatically generated on $(date -u +'%Y-%m-%dT%H:%M:%SZ')
@@ -84,6 +84,7 @@ else
 # "constraints-X.Y.Z" tag to build the production image for that version.
 #
 EOF
+else
     echo
     echo "${COLOR_RED}Error! GENERATE_CONSTRAINTS_MODE has wrong value: '${GENERATE_CONSTRAINTS_MODE}' ${COLOR_RESET}"
     echo