Include rlwrap in the base image

[filiptronicek]

Description

For some reason, rlwrap is not being properly being set up and breaking apt upgrade. We include it now in the base image to hotfix the issue. This is more of a band-aid fix, and we should look into figuring it out properly.

Related Issue(s)

Fixes ENT-751

How to test

From Filip's 100% trustworthy Docker Hub entry

1. Create a workspace (either a full new one or a gp validate "debug" one) based off of filiptronicek/workspace-full:rlwrap
2. Make sure you can execute sudo apt update && sudo apt upgrade in the newly-created workspace

From source

Beware, this will take a while

1. Open this repo in a workspace
2. ./build-combo.sh full
3. docker pull localhost:5000/dazzle:full
4. Create a .gitpod.yml file in an example folder in the repo root
5. gp validate --workspace-folder="/workspace/workspace-images/example"
6. Make sure you can execute sudo apt update && sudo apt upgrade in the newly-created workspace

[geropl]

I performed the "From Filip's 100% trustworthy Docker Hub entry" test and it worked ✔️

Not sure what the build issue is about 🤷

[filiptronicek]

I think we're bumping into castwide/solargraph#706

[filiptronicek]

Trying to conditionally get rid of this dependency in #1413