License Compliance command to list pre-installed tools doesn't work

Problem to solve

License Compliance docs says that command below can be used to list all the pre-installed tools:

$ docker run --entrypoint='' registry.gitlab.com/security-products/license-finder:4 /bin/bash -lc 'asdf list'
golang
  1.14
gradle
  6.3
java
  adopt-openjdk-11.0.7+10
  adopt-openjdk-8u242-b08
maven
  3.6.3
nodejs
  10.20.1
  12.16.3
php
  7.4.5
python
  2.7.18
  3.8.2
ruby
  2.6.6
sbt
  1.3.8

but the actual result will be

$ docker run --entrypoint='' registry.gitlab.com/security-products/license-finder:4 /bin/bash -lc 'asdf list'
dotnet-core
No versions installed
elixir
  1.10.4
golang
No versions installed
gradle
No versions installed
java
No versions installed
maven
No versions installed
nodejs
No versions installed
php
No versions installed
python
No versions installed
ruby
No versions installed
rust
No versions installed

Related problem: This might be what makes the following CI job fail:

TODO: create a separate issue for that other problem

Further details

asdf list can't list tools before the corresponding Debian packages have been installed.

Possible fix

Doc update: Install all the Debian packages from /opt/toolcache before running asdf.