Enabler: Add listingApiServer to frontend globals

[blairlearn]

Add a default endpoint for trial listing support API to the FrontendGlobals.json file.

When clinical trial listing pages (aka dynamic listing pages) were moved to a JSON app, the FrontendGlobals.json file was not updated to include a default endpoint. This causes confusion when testing new versions of APIs as it's not obvious what value to update

In FrontendGlobals.json define this new key as a child of ctsConfig:

"listingApiServer":"https:\/\/webapis.cancer.gov\/triallistingsupport\/v1"

Resources:

Prerequisites

Sub-Tasks

Notes