chore(ci): authenticate against harbor.cryptic.systems before pulling binfmt

The workflows pulled tonistiigi/binfmt through an unauthenticated request, either directly from docker.io or from
harbor.cryptic.systems before any credentials had been configured. Both variants are subject to upstream rate limiting
and made the multi arch builds fail sporadically.

The docker/login-action steps are now placed in front of docker/setup-qemu-action and docker/setup-buildx-action, and a
second login against harbor.cryptic.systems was added so that the binfmt image is always pulled from the internal
registry with valid credentials. Leftover setup-qemu-action and setup-buildx-action steps from the previous ordering
were removed.

All pinned actions were additionally bumped to their latest upstream release to remove the version drift between the
repositories.

.gitea/workflows/markdown-linters.yaml

@@ -15,7 +15,7 @@ jobs:
   markdown-lint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6.1.0
-    - uses: DavidAnson/markdownlint-cli2-action@ded1f9488f68a970bc66ea5619e13e9b52e601cd # v23.2.0
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+    - uses: DavidAnson/markdownlint-cli2-action@21c1be1b93ad9ed58fa840aacc3f279cde2a72ff # v24.2.0
       with:
         globs: '**/*.md'