[v3-1-test] Add guardrail to handle DAG deserialization errors in scheduler

[vatsrahul1001]

Backport of #61162

• Read the Pull Request Guidelines for more information. Note: commit author/co-author name and email in commits become permanently public when merged.
• For fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
• When adding dependency, check compliance with the ASF 3rd Party License Policy.
• For significant user-facing changes create newsfragment: {pr_number}.significant.rst or {issue_number}.significant.rst, in airflow-core/newsfragments.

[ephraimbuddy]

@choo121600 what happened? it seems you deleted v3-1-test

[choo121600]

Oops, my bad
I removed the branch by mistake🥲