Add index_redirect_routes_path_for_link migration to setup_postgresql

What does this MR do?

Add index_redirect_routes_path_for_link migration to setup_postgresql.rake

I tried to rake db:drop dev:setup, but I'm getting NameError: uninitialized constant IndexRedirectRoutesPathForLike

https://gitlab.slack.com/archives/C02PF508L/p1494239523970492

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

assigned to @smcgivern

@timothyandrew @selfup even though this doesn't strictly affect the release, I think this should be in the stable branch so that people can do this on the stable branch if needed. Wdyt? If you disagree, please remove the milestone + label.

changed milestone to %9.2

approved this merge request

enabled an automatic merge when the pipeline for 7854824b succeeds

merged

mentioned in commit 0b8bf5ed

mentioned in issue #31934 (closed)

Picked into 9-2-stable, will go into 9.2.0-rc1.

mentioned in commit 9632e01d