fix(ci): stop dev release tags nesting the previous dev tag

The dev release tagged itself with git describe plus -dev, and describe
resolved to the previous dev tag, so every tag appended to the last until
the tarball name passed the 255-byte filename limit. Describe against
release tags only, here and in the Makefile and bare-metal VERSION.

.github/workflows/dev-release.yml

@@ -86,7 +86,8 @@ jobs:
         working-directory: spinifex
         run: |
           set -euo pipefail
-          TAG="$(git describe --tags --always)-dev"
+          # Describing against a dev tag would nest it, growing the name every release.
+          TAG="$(git describe --tags --always --exclude '*-dev')-dev"
           case "$TAG" in
               v*) ;;
               *) echo "::error::git describe gave '$TAG', which is not a v-prefixed version"; exit 1 ;;

.github/workflows/e2e-baremetal.yml

@@ -123,7 +123,7 @@ jobs:
             INSTALLER_BIN="${RUNNER_TEMP}/bm-bins/spinifex-installer" \
             SPINIFEX_SRC="${GITHUB_WORKSPACE}" \
             VIPERBLOCK_SRC="${RUNNER_TEMP}/bm-bins/viperblock" \
-            VERSION="$(cd "$GITHUB_WORKSPACE" && git describe --tags --always 2>/dev/null || echo dev)"
+            VERSION="$(cd "$GITHUB_WORKSPACE" && git describe --tags --always --exclude '*-dev' 2>/dev/null || echo dev)"
 
       - name: Write ePDU credentials
         run: |