signed binaries for goreleaser

[ramin]

mimics the signed binaries by goreleaser as implemented in celestia-app so node can also generate signed binaries

@MSevey confirmed that we have an org level secret for GPG_SIGNING_KEY and GPG_PASSPHRASE so should require no repo setup

implementation for app: celestiaorg/celestia-app@934fded

Will follow up with some work to ensure this workflow actually gets triggered (currently the steps before do not pass and generate binaries)

closes: #2679

[MSevey]

Changes lgtm. Actions unfortunately still don't really have a great way to test beside live testing.

For this one, I'd recommend making a new clean fork of the repo so that you can merge this change into that fork. Then update the CI workflow to bypass the tests so that the release is triggered so that you can then verify that the binaries and release are generated and then you can download and verify the binary as well.

[ramin]

@MSevey replicated and got this setup working and signing on one of our test tools https://github.com/ramin/waypoint/actions/runs/6645867234/job/18058097433#step:5:54, really only thing i can't test is that our GPG secrets are available and correct, so we'll have to do it live. Will get this entire pipeline running next so we can see it generate some artifacts