[BUG] Timezone difference in error timestamp unit tests

[mao3267]

Tracking issue

None

Why are the changes needed?

While running CI tests locally, it turns out that the time from datatime.now() is not using UTC timezone, causing errors while comparing current time and error time.

What changes were proposed in this pull request?

1. Set the timezone to UTC using monkeypatch.

How was this patch tested?

1. Using make unit_test to make sure all existing tests pass.

Setup process

git clone https://github.com/flytorg/flytekit.git
gh pr checkout 2952
pip install -e .

Screenshots

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Related PRs

None

Docs link

None

[wild-endeavor]

oops, ignore previous comment.

[mao3267]

The CI Error is caused by the Mashumaro update to 3.15. #2952 is the PR working on this fix.