allow versions which provide build info to be versionchecked (#839)

Signed-off-by: sluetze <13255307+sluetze@users.noreply.github.com>

Author: sluetze

Tests/kaas/k8s-version-policy/k8s_version_policy.py

@@ -171,7 +171,7 @@ def __str__(self):
 
 
 def parse_version(version_str: str) -> K8sVersion:
-    cleansed = version_str.strip().removeprefix("v")
+    cleansed = version_str.strip().removeprefix("v").split("+")[0]  # remove leading v as well as build info
     try:
         major, minor, patch = cleansed.split(".")
         return K8sVersion(int(major), int(minor), int(patch))