`TestHostname` does not filter 24.04 Ubuntu Accelerator images properly

Hey all, me again 😄 We're currently running with git tag `20250919.00` and unfortunately Noble 24.04 accelerator images are failing on `TestHostname` with the following: ```` <testcase name="TestHostname" classname="" time="0.000"> <failure message="Failed"><![CDATA[ hostname_validation_test.go:106: linux hostname error: hostname does not match metadata. Expected: "vm1-hostnamevalidation-wq294" got: "vm1-hostnamevalidation-wq294.c.ubuntu-os-cloud-testing.internal"]]></failure> </testcase> ```` I think it's just a case of adding the accelerator images (example image name `daily-ubuntu-accelerator-2404-amd64-with-nvidia-580-v20250925`) to [the `hostnameExceptions` list](https://github.com/GoogleCloudPlatform/cloud-image-tests/blob/449eadce5458ebb8b4387cf88ba5c58d9d49ef39/test_suites/hostnamevalidation/hostname_validation_test.go#L86)? Thanks in advance! If you need me to test anything just shout :)