Improve xhprof availability and revert to just using the classic run list page

[rfay]

The Problem/Issue/Bug:

• The xhprof footer wasn't available in symfony-based CMSs like Drupal 9
• Sometimes the xhprof page got profiled itself, making a mess of things
• There was an undefined variable complaint on the xhprof page itself

How this PR Solves The Problem:

• Abandoned the attempt to add a footer to the profiled page. This completely failed in TYPO3 because it ruined json responses, etc. It would break any API response. You just can't naively add text to a modern webapp's html output.
• Make sure /xhprof* didn't get profiled
• Made it work with command-line execution and API and TYPO3

Manual Testing Instructions:

• Use the ddev download from this build; you can brew unlink ddev and just put the downloaded ddev in your PATH. Alternately, use gitpod by visiting link and you'll have the built item all set up.
• If your project has a custom .ddev/apache/apache-site.conf please remove it temporarily (the URL for the xhprof app is added in the default apache config)
• ddev xhprof on
• Visit a page and profile it. (This gives instructions about the URL with run details)

Automated Testing Overview:

Nothing new

Related Issue Link(s):

Release/Deployment notes:

[gitpod-io]

[rfay]

@LionsAd @penyaskito I'd love if you could take a look at this, especially the rewritten prepend script (and append is gone).

I'm adding manual testing instructions to the OP.

[LionsAd]

Maybe we want the ability for a dev user to supply their own script here?

[rfay]

I have been thinking about that, and definitely agree. Can go so very far into the weeds. I've also thought about having the script optionally add the link at the bottom. But mucking with the output breaks all APIs and all command-line scripts and lots of web pages (like TYPO3).

[rfay]

I think it would be cool to have the shutdown function include a file which was easily editable by the user, perhaps empty by default.