Update 'Trial-end widget' popover copy

What does this MR do and why?

1. Update the trial-end widget popover copy
2. Change ordering of CTAs on both trial-end widget popover and active-trial-status widget popover.

Screenshots or screen recordings

Widget	Before	After
Trial-end
Active-trial-status

How to set up and validate locally

1. Simulate SaaS and start GDK.
2. Create a new private top level group, get the group id from group overview page.
3. To observe the active-trial-status widget and popover, run the following command in rails console:

   Group.find(your_group_id).gitlab_subscription.update_columns(trial: true, hosted_plan_id: 7, trial_starts_on: 10.days.ago, trial_ends_on: 10.days.from_now)

   You should see the active-trial-status widget in the sidebar, hover over it will display the popover.
4. To observe the trial-end widget and popover, run the following command in rails console after running the above command:

   Group.find(your_group_id).gitlab_subscription.update_columns(hosted_plan_id: nil, trial_ends_on: 1.days.ago)

   You should see the trial-end widget in the sidebar, hover over it will display the popover.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #431814