Check whether `context[key]`has variables that are no longer available

[sunank200]

Description

The following context variables are no longer available:

execution_date
next_ds
next_ds_nodash
next_execution_date
prev_ds
prev_ds_nodash
prev_execution_date
prev_execution_date_success
tomorrow_ds
yesterday_ds
yesterday_ds_nodash

This change is part of #43902.

Use case/motivation

Its been removed in #43902.

Related issues

41641

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[sunank200]

Created the PR: 15144

[uranusjr]

I think this should be closed?

[sunank200]

A follow-up PR can be created to perform this check in other contexts like the Operator.execute method. More details at: astral-sh/ruff#15144 (comment)