Doing coverage checks on Ubuntu 22.04 instead of latest due to autoconf lcov >= 2.0 issue

[filipecosta90]

CI on memtier is failing reference failure but due to ubuntu 24.04 support (they should have changed ubuntu:latest to it).
Related to lcov >= 2.0 version check. To fix it we should do coverage checks on Ubuntu 22.04 instead of latest.
On 24.04 we have:

Get:42 http://azure.archive.ubuntu.com/ubuntu noble/universe amd64 lcov all 2.0-4ubuntu2 [223 kB]

and we want:

checking for lcov version... invalid
configure: error: You must have one of the following versions of lcov: 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1.13 1.14 1.15 1.16 (found: /etc/lcovrc).
Error: Process completed with exit code 1.

reference happening to others:
autoconf-archive/autoconf-archive#298 (comment)

After my github-actions runner was updated to ubuntu 24.04.1 (latest) it received new version of lcov.
This also broke my CI/CD workflow. I hope maintainers will address this issue!
For now I will downgrade my runner to ubuntu 22.04.