Re-Activate Metric-Gardener after a new release `metricgardener` and Node20 Upgrade

[phanlezz]

Re-activate the Metric-Gardener on-the-fly execution metricgardener

... as soon as a new version is released on npm, which removes the dependency on deprecated zlib. And Codecharta upgrades to Node version 20

Acceptance criteria

• Remove all mentions of temporary removal
• Re-add it to the Dockerfile from analysis as a npm install
• Reverse the code changes in the importer and remove the associated test
• Activate the old tests
• Check docker execution!

Dev Notes

Relevant PRs: #3542 #3545

[phanlezz]

Metric Gardener released its version 1.0 so this issue is not blocked anymore.

[Nereboss]

After trying this out, there are some problems that prevent us from reactivating it:

• MG requires node v.20 in their package.json while we only require node v.18.
• MG uses features of typescript 5.3, which are incompartible with node v.18 (tested on node v.18.18), so ignoring the incompatible version does not work.

We should discuss the best way to handle this, maybe including someone from the MG team to find out if its feasable to reduce their requirements to node 18. This issue is being blocked until this has been discussed.