workflows: Add explicit permissions for attestation

We have a number of jobs that nest the build-static-tarball
workflows later on. Due to these doing attest build provenance,
and pushing to ghcr.io, t hey need write permissions on
`packages`, `id-token` and `attestations`, so we need to set
these permissions on the top-level jobs (along with `contents: read`),
so they are not blocked.

Signed-off-by: stevenhorsman <steven@uk.ibm.com>

.github/workflows/ci-devel.yaml

@@ -4,6 +4,11 @@ on:
 
 jobs:
   kata-containers-ci-on-push:
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+      attestations: write
     uses: ./.github/workflows/ci.yaml
     with:
       commit-hash: ${{ github.sha }}