Revert functionality to match user session to Reporter field when providing feedback through Issue Collector

Problem definition

In attempt to mitigate the effect of implementing SameSite cookie control in Chrome browser v80, changes were done to Issue Collector in scope of this bug ticket: JRASERVER-70494.

One resulting effect of fixing the same was dropped XSRF check, which has a consequence that the session of a logged in user is not matched to the Reporter field after reporting issue via Issue Collector.

Instead, the user gets presented with a reporter email address field that will be used to match the Reporter of the issue. This makes the Issue Collector feedback a bit less efficient to collect the feedback for already logged-in users.

Suggested resolution

Bring back the user-session matching functionality to the Issue Collector in Jira.