Set timeout for pytest workflow to 1 hour

[BrianJKoopman]

Description

Uses the timeout-minutes setting to reduce our maximum test run time from 6 hours to 1 hour.

Motivation and Context

If tests hang, they'll hit the 6 hour timeout. Our tests typically take 20-30 minutes to run, an hour long timeout is plenty for us and avoids hogging a runner for 5 extra hours.

How Has This Been Tested?

Not tested.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.