[Searches page] Add `time_taken` filters

[hilmanski]

A customer requested the ability to filter the response time of searches on the search page. For example, filter min and max time of each search.

Example use case: The user wants to see if there are any searches that run for more than X seconds.

Intercom

Related to:

• https://github.com/serpapi/public-roadmap/issues/873
• https://github.com/serpapi/public-roadmap/issues/873

[schaferyan]

Also related to https://github.com/serpapi/public-roadmap/issues/125 and https://github.com/serpapi/public-roadmap/issues/65