Use native compression tools instead of git archive for releases

[jwrober]

Closes #2179

[lmoureaux]

Does this exclude the same files as git-archive? Packaging the whole data results in quite heavy tarballs

[jwrober]

You get ~100mb files. I can add more excludes if needed. What in data do we not want to ship?

[jwrober]

I pulled data/graphics out. Now the archives are around 50mb

[jwrober]

Works as expected on my fork
https://github.com/jwrober/freeciv21/actions/runs/8500972813/job/23283394633

[lmoureaux]

These are the export-ignore from .gitattributes:

# don't export these files
data/graphics/**    export-ignore
.coverity/**        export-ignore
.github/**          export-ignore
.gitlab-ci.yaml     export-ignore
.readthedocs.yaml   export-ignore

[lmoureaux]

An alternative approach would be to commit the autorevision changes and keep using git archive

[jwrober]

We get all of those w/ git archive too, so I don't see an issue there.

[jwrober]

My solution doesn't pull those in.

[lmoureaux]

Interesting 😂 I see .coverity (empty dir) and .gitlab-ci.yml in the latest tarball, but not the other two.
With your solution we don't package any hidden file, which works as well

[jwrober]

I did see an issue in the zip file. Since it runs after the gz creating it also pulls in the sha file. I'll push a fix