`clr-installer` fails to run on non-clearlinux distro's due to hardcoded `VERSION_ID` check

[ThaDaVos]

Describe the bug
A clear and concise description of what the bug is.

I tried to use the clr-installer on my Ubuntu 22.04 distro to create a custom installation iso of ClearLinux but at

clr-installer/clr-installer/main.go

Line 524 in a0fef5f

if err := utils.ParseOSClearVersion(); err != nil {

it's querying for the ClearLinux version, but I am not running ClearLinux so it fails as regex at

clr-installer/utils/utils.go

Line 44 in a0fef5f

versionExp := regexp.MustCompile(`VERSION_ID=([0-9][0-9]*)`)

does not support Ubuntu's format of the /usr/lib/os-release, which is:

PRETTY_NAME="Ubuntu 22.04.4 LTS"
NAME="Ubuntu"
VERSION_ID="22.04"
VERSION="22.04.4 LTS (Jammy Jellyfish)"
VERSION_CODENAME=jammy
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=jammy

The difference is in the VERSION_ID as it's quoted on Ubuntu, at least on mine, and it's just numeric on ClearLinux's version.

To Reproduce
Steps to reproduce the behavior:

1. Build the clr-installer from source on Ubuntu
2. Get copy of https://download.clearlinux.org/current/config/image/ according to https://community.clearlinux.org/t/how-to-build-the-official-style-iso-image/8419/7
3. call clr-installer --config live-server.yaml
4. See it fail

Expected behavior
A clear and concise description of what you expected to happen.
Or the installer should throw an error telling the OS is not supported (or that ClearLinux is only supported) or it should run just fine and create me the requested iso I want.

Screenshots
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Environment (please complete the following information):

• Clear Linux OS Version: [swupd info] N/A
• Installer Version [clr-installer -v] 2.7.11
• Platform: [hardware infomation] WSL2 with Ubuntu

Additional context
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