test(cat-gateway): Add hypothesis-deadline to schemathesis vars and extend it for nightly

[oldGreg5]

Description

In nightly we have schemathesis running with more examples and sometimes test run longer that max 15000milis.
This will extend it for nightly run only.

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• My code follows the style guidelines of this project
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[github-actions]

📚 Docs Preview

The docs for this PR can be previewed at the following URL:

https://docs.dev.projectcatalyst.io/voices/schemathesis-set-hypothesis-deadline

[kukkok3]

LGTM