chore: Makefile using test flags and timeout

[orpheuslummis]

Relevant issue(s)

Resolves #1251

Description

Just fixes this little annoying detail I had a few times.

Is 60 seconds per package enough for the slow CI? (I think the timeout is per package)

Tasks

• I made sure the code is well commented, particularly hard-to-understand areas.
• I made sure the repository-held documentation is changed accordingly.
• I made sure the pull request title adheres to the conventional commit style (the subset used in the project can be found in tools/configs/chglog/config.yml).
• I made sure to discuss its limitations such as threats to validity, vulnerability to mistake and misuse, robustness to invalidation of assumptions, resource requirements, ...

How has this been tested?

[codecov]

Codecov Report

Merging #1397 (f6870e6) into develop (a0160e0) will increase coverage by 0.12%.
The diff coverage is n/a.

❗ Current head f6870e6 differs from pull request most recent head 6f0a46c. Consider uploading reports for the commit 6f0a46c to get more accurate results

@@             Coverage Diff             @@
##           develop    #1397      +/-   ##
===========================================
+ Coverage    70.52%   70.64%   +0.12%     
===========================================
  Files          185      184       -1     
  Lines        17934    17836      -98     
===========================================
- Hits         12648    12601      -47     
+ Misses        4321     4283      -38     
+ Partials       965      952      -13     

see 13 files with indirect coverage changes

[fredcarle]

LGTM

[fredcarle]

thought: 60s might even be too much but since it's in the CI it's not a big deal.