Improve the error handling with Org-level G Suite integration

Problem Definition

Some sync error between G Suite and Atlassian is not clear to the admins such as

In that scenario specifically, the issue was that G Suite was trying to push an email update to an account, however, the target email address was already in use by a different Atlassian Account. That gives no clue to the admin what is happening and how they can resolve the issue.

Suggested Solutions

Improve how we handle the error messages in the new G Suite sync. In example:

We can proceed and update <account_email_address> to <target_email> because <account_profile_link> is already using that email.

Note: this does difficulty does not affect the sync of other accounts & groups

I created an error message for this:
*We're unable to update email account *
This <<account_email_address> already has an Atlassian account. You can only update to an email address that doesn't have an Atlassian account.