Add support or guidelines on installing the linux tools `perf` tool

Is your feature request related to a problem? Please describe

First of all. We ❤️ GitPod at tremor. Tip of the hat to all involved!

One of the tools we use for performance analysis is the perf linux tool. It isn't obvious how to
install this as usual incantations via apt-get fail, and identifying the correct variant via uname -r
doesn't help.

Describe the behaviour you'd like

A minimal guide for how to get perf installed so perf stat, perf record can be run. Our
project happens to be primarily rust based, but we sometimes need to debug native libraries
such as librdkafka.

Describe alternatives you've considered

Alternatives include using dedicated hardware ( which we use for lengthy benchmark runs and
automated benchmarking via equinix metal ). However, having this within a gitpod workspace would
be useful to show new contributors to the project how to get started with benchmarking and used to
performance engineering tools.

Additional context

The following incantation may illustrate:

sudo apt-get install -y linux-tools linux-tools-`uname -r`
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package linux-tools is a virtual package provided by:
  linux-tools-virtual-hwe-20.04-edge 5.13.0.27.29~20.04.13
  linux-tools-virtual-hwe-20.04 5.13.0.30.33~20.04.17
  linux-tools-virtual 5.4.0.100.104
  linux-tools-oracle-lts-20.04 5.4.0.1064.64
  linux-tools-oracle-edge 5.13.0.1018.22~20.04.1
  linux-tools-oracle 5.13.0.1018.22~20.04.1
  linux-tools-oem-20.04d 5.14.0.1024.22
  linux-tools-oem-20.04 5.14.0.1024.22
  linux-tools-lowlatency-hwe-20.04-edge 5.13.0.27.29~20.04.13
  linux-tools-lowlatency-hwe-20.04 5.13.0.30.33~20.04.17
  linux-tools-lowlatency 5.4.0.100.104
  linux-tools-intel 5.13.0.1009.10
  linux-tools-ibm-lts-20.04 5.4.0.1015.16
  linux-tools-ibm 5.4.0.1015.16
  linux-tools-gkeop-5.4 5.4.0.1034.37
  linux-tools-gkeop 5.4.0.1034.37
  linux-tools-gke-edge 5.13.0.1013.16~20.04.1
  linux-tools-gke-5.4 5.4.0.1063.73
  linux-tools-gke 5.4.0.1063.73
  linux-tools-generic-hwe-20.04-edge 5.13.0.27.29~20.04.13
  linux-tools-generic-hwe-20.04 5.13.0.30.33~20.04.17
  linux-tools-generic 5.4.0.100.104
  linux-tools-gcp-lts-20.04 5.4.0.1065.75
  linux-tools-gcp-edge 5.13.0.1015.18~20.04.2
  linux-tools-gcp 5.13.0.1015.18~20.04.2
  linux-tools-aws-lts-20.04 5.4.0.1066.68
  linux-tools-aws-edge 5.13.0.1014.15~20.04.7
  linux-tools-aws 5.13.0.1014.15~20.04.7
You should explicitly select one to install.

E: Package 'linux-tools' has no installation candidate
E: Unable to locate package linux-tools-5.16.14-051614-generic
E: Couldn't find any package by glob 'linux-tools-5.16.14-051614-generic'
E: Couldn't find any package by regex 'linux-tools-5.16.14-051614-generic'

And, the result of uname -r

uname -r
5.16.14-051614-generic

The perf tool needs to target the correct kernel version so this was a good place to stop where
auto discovering same wasn't successful.

Also - learning heaps from your Docker repo too 👍

No repository file or test is named. Start by locating Gitpod's workspace documentation or image configuration for Ubuntu package installation, then verify the documented approach installs perf and allows perf stat and perf record to run. Done means a minimal, reproducible guide addresses the kernel-version mismatch shown in the issue.