Remove the `docker volume rm` statement from the `ddev get drud/ddev-drupal9-solr` output

[rpkoller]

If you install the drupal9-solar add-on you get currently the following output with ddev 1.19.0:

$> ddev get drud/ddev-drupal9-solr
Downloading https://api.github.com/repos/drud/ddev-drupal9-solr/tarball/v1.1.1
v1.1.1_4133593099.tar.gz 1.22 MiB / ? [---------------------------------------------------------------------------------------------------------------------------=-------------------------------------------------] 12803.42% 0s
docker volume rm ddev-${DDEV_PROJECT}_solr 2>/dev/null || true

Installed file /Users/myuser/Sites/happen/.ddev/solr
Installed file /Users/myuser/Sites/happen/.ddev/docker-compose.solr.yaml
Executed post-install action chmod +x solr/docker-entrypoint-initdb.d/solr-configupdate.sh.
Downloaded add-on drud/ddev-drupal9-solr, use `ddev restart` to enable.
For more information about this add-on visit the source repo at
https://github.com/drud/ddev-drupal9-solr
Please file issues and create pull requests there to improve it.

The string docker volume rm ddev-${DDEV_PROJECT}_solr 2>/dev/null || true might be hidden from the users. it doesn`t provide any benefit or information and is rather confusing for the user.

[rfay]

The reality is that that's a "pre-install action", and those are output as they happen. They could probably use some explanation.

pre_install_actions:
- "docker volume rm ddev-${DDEV_PROJECT}_solr 2>/dev/null || true"

But I don't understand why we need to do that in the first place, so I'll remove it.

[rfay]

• Remove removal of docker volume, fixes #1 #2

[rfay]

Also

• Improve output of ddev get ddev#3711