ci: Attempting to fix slsa

Attempting to get the slsa generator working with a few other changes

Signed-off-by: Tyler Erickson <tyler.erickson@seagate.com>

.github/workflows/meson.yml

@@ -275,6 +275,7 @@ jobs:
       shell: bash
 
     - name: Generate Hashes
+      if: ${{ matrix.config.publish_release }}
       shell: bash
       id: hash
       run: |
@@ -285,7 +286,7 @@ jobs:
           # https://github.com/slsa-framework/slsa-github-generator/blob/main/internal/builders/generic/README.md#provenance-for-artifacts-built-across-multiple-operating-systems
           set -euo pipefail
           (sha256sum -t ${{ format('./build/{0}{1}', env.DESTDIR, matrix.config.release_extension) }} || shasum -a 256 ${{ format('./build/{0}{1}', env.DESTDIR, matrix.config.release_extension) }}) > checksum
-          echo "hash-${{ matrix.release_name }}=$(base64 -w0 checksum || base64 checksum)" >> "${GITHUB_OUTPUT}"
+          echo "hash-${{ matrix.release_name }}=$(base64 -w0 checksum || base64 checksum)" >> "$GITHUB_OUTPUT"
 
     - name: Uploading artifacts
       uses: actions/upload-artifact@v4
@@ -309,6 +310,7 @@ jobs:
   provenance:
     needs: [build]
     strategy:
+      fail-fast: false #don't cancel other jobs if one is failing
       matrix:
         #NOTE: this release_name MUST match EXACTLY the name used by the build job above!
         release_name: [ "win-x64",