Add filter with run_after field in dags/:dagid/runs page

[Prajwal7842]

This PR adds support for filtering dag runs on dags/:dag_id/runs page using run_after field. This enables lookback from a timestamp allowing users to view dag runs way far back.

This requires creating a SingleDatePicker component and adding it in the filter panel for selection.
By default, when the date time picker is selected, the default input is the current date and time.

On selecting a date and time, runs are filtered accordingly. From SS below, we can see that a datetime is selected and even though there are newer runs, the left panel shows only dag runs ending at the selected date time.

In case of an existing issue, reference it using one of the following:

• closes: Cannot view >50 dag runs #60521
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Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)
  Claude for writing the new date picker component and tests.

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[Prajwal7842]

Looking to verify whether the solution works or not. For eg:

1. Having filter on "Run After" field works or not. Should we use logical date instead, as that is something fixed for a dag run ?
2. Text used is sufficient to help users understand the meaning of this filter or not.

Thank you!