Only test supported versions of airflow (DataDog#20743)

* fix airflow test envs

* fix

* remove 3.x

Author: sarah-witt

airflow/hatch.toml

@@ -2,12 +2,11 @@
 
 [[envs.default.matrix]]
 python = ["3.12"]
-version = ["2.1", "2.6"]
+version = ["2.11"]
 
 [envs.default.overrides]
 matrix.version.env-vars = [
-  { key = "AIRFLOW_VERSION", value = "2.1.4", if = ["2.1"] },
-  { key = "AIRFLOW_VERSION", value = "2.6.2", if = ["2.6"] },
+  { key = "AIRFLOW_VERSION", value = "2.11.0", if = ["2.11"] },
 ]
 
 [envs.latest.env-vars]