chore: release tarballs (#10956)

# Which Problems Are Solved

This PR makes sure that the tarballs containing the API binary and the
standalone login are separately downloadable from the release pages
again.

# How the Problems Are Solved

Because the `Pack` workflow uploads a single GitHub artifact containing
all tarballs since #10571, we download this artifact so that it
correctly unpacks into the correct folder structure configured in
`.releaserc.js`

The changes are tested [with this action
run](https://github.com/eliobischof/zitadel/actions/runs/18745783976),
which [created this
release](https://github.com/eliobischof/zitadel/releases/tag/v1.0.0-release-archives.5).

# Additional Changes

- The term `standalone` is removed from the login tarball, as it should
be clear that it is a standalone build.
- The go builds and the login archiving are less verbose
- The pipelines go versions are pinned to *v1.25*, a minor above the
minimally required go version *v1.24.0* described in the go.mod file.
This makes sure that we build using newer patches for security and
performance.

# Additional Context

- The archives weren't published anymore since #10571
- Closes #10896

---------

Co-authored-by: Silvan <27845747+adlerhurst@users.noreply.github.com>
(cherry picked from commit b080ed8884)

project.json

@@ -27,12 +27,12 @@
         "options": {
             "parallel": false,
             "commands": [
-                "sha256sum .artifacts/pack/zitadel-*-*.tar.gz > .artifacts/pack/checksums.txt"
+                "sha256sum .artifacts/pack/zitadel-*.tar.gz > .artifacts/pack/checksums.txt"
             ]
         },
         "cache": true,
         "inputs": [
-            "{workspaceRoot}/.artifacts/pack/zitadel-*-*.tar.gz"
+            "{workspaceRoot}/.artifacts/pack/zitadel-*.tar.gz"
         ],
         "outputs": [
             "{workspaceRoot}/.artifacts/pack/checksums.txt"