Better ci infrastructure

[Jacalz]

Description:

Various changes to make it easier to maintain (or rather have it maintain itself) and also some cleanups plus simplifications.

• Moved the licence check workflow run into the static analysis test.
• Stop running benchmarks on CI, no one looks at this output and it doesn't fail or notify us if performance goes bad so there is really very little gain from the extra time it takes. Let's add some specific benchmark workflow in the future instead if necessary.
• Use latest Go version automatically to avoid having to change required versions each time.
• Switch to actions/setup-go which is better maintained and has built in dependency caching infrastructure (a fresh build after go.mod changes is likely slower but we avoid downloading dependencies for all else).
• Load version from go.mod automatically using workaround until Use version from module and another version in matrix testing actions/setup-go#450 is implemented.

Checklist:

• Tests included.
• Lint and formatter run with no errors.
• Tests all pass.

[coveralls]

coverage: 59.044% (+0.009%) from 59.035%
when pulling 3269857 on Jacalz:better-ci-infrastructure
into 8726c8b on fyne-io:develop.

[andydotxyz]

Cool

[Jacalz]

Thanks. Feel free to update required workflows and merge when you are ready :)

[Jacalz]

I added a little change so we can load the version from go.mod automatically. With this, we should basically don't have to touch workflows much going forward. They should mostly maintain themselves. The downside is that workflow naming is a bit convoluted (one being called nothing and one being called stable but I think it is worth it). Once actions/setup-go#450 lands, it will likely be go.mod and stable :)

[andydotxyz]

Perfect thanks, I think that is the settings updated

[Jacalz]

Great. Just an approval needed before it can be merged :)