PCP: show goal/raised in AdminUI, fix PCPInfo page on mobile, remove delete link

[mlutfy]

Overview

More improvements related to #34168:

• Improves the default PCPInfo layout on mobile
• Removes the "Delete" link from the PCPInfo page, so people can disable their page, but not delete it. Deleting is pretty drastic and adds to clutter.
• AdminUI Manage PCP pages: adds "goal" and "raised" columns, and removes the start/end date (those start/end dates are for the upstream Contrib or Event pages, so they're very redundant)
• AdminUI Manage PCP pages: adds a "is-active" filter, and by default shows only active pages (everywhere I have seen PCP used, they do it on a yearly basis, and disable the old pages, so the filter is very useful).

Before

(described above)

After

AdminUI : Manage Personal Campaign Pages:

Mobile support, with lots of text, banner image, etc:

pr34175-1.webm

Technical Details

I manually tweaked the IFNULL etc clauses, because SearchKit would add GROUP_CONCAT around all fields, and then it wasn't really working, so I removed the GROUP_CONCAT because it felt not necessary. I tested this on MariaDB 11.8, but I remember sometimes group-concat behaves differently based on different MySQL modes.

[civibot]

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[mlutfy]

Related RL PR by @vingle #34197