chore: add resolute release support

Author: blackboxsw

tests/integration_tests/releases.py

@@ -100,6 +100,7 @@ def from_os_image(
 ORACULAR = Release("ubuntu", "oracular", "24.10")
 PLUCKY = Release("ubuntu", "plucky", "25.04")
 QUESTING = Release("ubuntu", "questing", "25.10")
+RESOLUTE = Release("ubuntu", "resolute", "26.04")
 
 UBUNTU_STABLE = (FOCAL, JAMMY, MANTIC, NOBLE)