Fix choosing backend versions in breeze's command line

Choosing version of backend were broken when command line switches
were used. The _VERSION variables were "hard-coded" to defaults
rather than taken from command line. This is a remnant of initial
implementation and converting the parameters to "cacheable" ones.

While looking at the versions we also found that PARAM_NAME_FLAG
is not used any more so we took the opportunity to remove it.

dev/breeze/src/airflow_breeze/global_constants.py

@@ -102,18 +102,6 @@
     "MSSQL_VERSION": "MSSql version",
 }
 
-PARAM_NAME_FLAG = {
-    "BACKEND": "--backend",
-    "MYSQL_VERSION": "--mysql-version",
-    "KUBERNETES_MODE": "--kubernetes-mode",
-    "KUBERNETES_VERSION": "--kubernetes-version",
-    "KIND_VERSION": "--kind-version",
-    "HELM_VERSION": "--helm-version",
-    "EXECUTOR": "--executor",
-    "POSTGRES_VERSION": "--postgres-version",
-    "MSSQL_VERSION": "--mssql-version",
-}
-
 EXCLUDE_DOCS_PACKAGE_FOLDER = [
     'exts',
     'integration-logos',
@@ -165,9 +153,6 @@ def get_default_platform_machine() -> str:
 CURRENT_POSTGRES_VERSIONS = ['10', '11', '12', '13', '14']
 CURRENT_MYSQL_VERSIONS = ['5.7', '8']
 CURRENT_MSSQL_VERSIONS = ['2017-latest', '2019-latest']
-POSTGRES_VERSION = CURRENT_POSTGRES_VERSIONS[0]
-MYSQL_VERSION = CURRENT_MYSQL_VERSIONS[0]
-MSSQL_VERSION = CURRENT_MSSQL_VERSIONS[0]
 DB_RESET = False
 START_AIRFLOW = "false"
 LOAD_EXAMPLES = False

dev/breeze/src/airflow_breeze/utils/docker_command_utils.py

@@ -45,11 +45,8 @@
     MOUNT_ALL,
     MOUNT_SELECTED,
     MSSQL_HOST_PORT,
-    MSSQL_VERSION,
     MYSQL_HOST_PORT,
-    MYSQL_VERSION,
     POSTGRES_HOST_PORT,
-    POSTGRES_VERSION,
     REDIS_HOST_PORT,
     SSH_PORT,
     WEBSERVER_HOST_PORT,
@@ -566,9 +563,12 @@ def update_expected_environment_variables(env: Dict[str, str]) -> None:
     "ISSUE_ID": "issue_id",
     "LOAD_EXAMPLES": "load_example_dags",
     "LOAD_DEFAULT_CONNECTIONS": "load_default_connections",
+    "MYSQL_VERSION": "mysql_version",
+    "MSSQL_VERSION": "mssql_version",
     "NUM_RUNS": "num_runs",
     "PACKAGE_FORMAT": "package_format",
     "PYTHON_MAJOR_MINOR_VERSION": "python",
+    "POSTGRES_VERSION": "postgres_version",
     "SQLITE_URL": "sqlite_url",
     "START_AIRFLOW": "start_airflow",
     "SKIP_ENVIRONMENT_INITIALIZATION": "skip_environment_initialization",
@@ -580,11 +580,8 @@ def update_expected_environment_variables(env: Dict[str, str]) -> None:
 DOCKER_VARIABLE_CONSTANTS = {
     "FLOWER_HOST_PORT": FLOWER_HOST_PORT,
     "MSSQL_HOST_PORT": MSSQL_HOST_PORT,
-    "MSSQL_VERSION": MSSQL_VERSION,
     "MYSQL_HOST_PORT": MYSQL_HOST_PORT,
-    "MYSQL_VERSION": MYSQL_VERSION,
     "POSTGRES_HOST_PORT": POSTGRES_HOST_PORT,
-    "POSTGRES_VERSION": POSTGRES_VERSION,
     "REDIS_HOST_PORT": REDIS_HOST_PORT,
     "SSH_PORT": SSH_PORT,
     "WEBSERVER_HOST_PORT": WEBSERVER_HOST_PORT,