Fixed reference URLs on delivery service (DNS, HTTP) pages

[rimashah25]

What does this PR (Pull Request) do?

• This PR fixes Reference urls for Cache Config in TP are invalid #5010, reference URLs on Delivery Service Page, specifically for type: HTTP and DNS

Which Traffic Control components are affected by this PR?

• Traffic Portal

What is the best way to verify this PR?

1. Go to traffic_portal's create a delivery service page.
2. Select either HTTP, or DNS type
3. Go to section Cache Configuration Settings, and hover over every field in that section and click on the links present in help tool tip.
4. No link should show a page does not exists yet error.

If this is a bug fix, what versions of Traffic Control are affected?

master (d809e9a)

The following criteria are ALL met by this PR

• I have explained why tests are unnecessary
• I have explained why documentation is unnecessary
• This PR includes an update to CHANGELOG.md OR such an update is not necessary
• This PR includes any and all required license headers
• This PR ensures that database migration sequence is correct OR this PR does not include a database migration
• This PR DOES NOT FIX A SERIOUS SECURITY VULNERABILITY (see the Apache Software Foundation's security guidelines for details)

Additional Information

The PR doesn't need documentation or tests since it only updates the Reference URL path in Traffic Portal. No logic has been implemented.

[ocket8888]

This looks like it works for what it changes - however, HTTP and DNS Delivery Service pages in TP still have two broken references. The first is in the "Deep Caching" field's tooltip, where it should probably be https://traffic-control-cdn.readthedocs.io/en/latest/admin/traffic_router.html#deep-caching to link to the correct anchor. The other is in the tooltip for "Geo Limit Redirect URL" and to be honest I'm not sure where that's supposed to take you.

Neither of these land on 404 pages, they're just non-existent anchors on an existent page. So you don't need to fix that if you don't want to, but I thought I'd bring it up.

[rimashah25]

This looks like it works for what it changes - however, HTTP and DNS Delivery Service pages in TP still have two broken references. The first is in the "Deep Caching" field's tooltip, where it should probably be https://traffic-control-cdn.readthedocs.io/en/latest/admin/traffic_router.html#deep-caching to link to the correct anchor. The other is in the tooltip for "Geo Limit Redirect URL" and to be honest I'm not sure where that's supposed to take you.

Neither of these land on 404 pages, they're just non-existent anchors on an existent page. So you don't need to fix that if you don't want to, but I thought I'd bring it up.

I updated both these reference urls.