Replace except X | Y with comma form for Python 3.14

[hmeir]

Short description:

On 3.14, except X | Y fails at import time,
because its evaluates totyping.Union,
which is not a BaseException subclass. Use comma-separated exceptions instead.

More details:

What this PR does / why we need it:

Which issue(s) this PR fixes:

Special notes for reviewer:

jira-ticket:

https://redhat.atlassian.net/browse/CNV-86480

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