ci: Add additional triggers for CI release workflow

* add x.y.z-a tag support
* add manual trigger stuff

Signed-off-by: Ava Hahn <a.hahn@f5.com>

Author: avahahn

.github/workflows/unitctl.yml

@@ -10,6 +10,13 @@ on:
       - master
     tags:
       - '[0-9]+.[0-9]+.[0-9]+'
+      - '[0-9]+.[0-9]+.[0-9]+-[0-9]+'
+  workflow_dispatch:
+    inputs:
+      version:
+        description: "Semver tag"
+        type: environment
+        required: true
 
 permissions:
   contents: write
@@ -92,12 +99,6 @@ jobs:
       - run: rustup update stable
       - run: rustup target add ${{ matrix.target }}
 
-      - name: Install cross
-        if: matrix.target == 'aarch64-unknown-linux-gnu'
-        uses: taiki-e/install-action@v2
-        with:
-          tool: cross
-
       - uses: Swatinem/rust-cache@v2
         with:
           prefix-key: rust-${{ matrix.build }}
@@ -136,7 +137,7 @@ jobs:
 
       - name: Get the version from the tag
         run: |
-          version=${{ github.ref_name }}
+          version=${version:=${{ github.ref_name }}
           short="${version#*/}"
           echo $version; echo $short
           echo "VERSION=$version" >> $GITHUB_ENV