ci: drop fork guard on ghcr ORAS pull -- prevented nightly on forks

build-wolfprovider.yml gated its `Login to ghcr.io` and
`Download pre-built packages from ghcr.io` steps on
`github.repository == 'wolfSSL/wolfProvider'`. On a fork run
(aidangarske/wolfProvider firing nightly-osp.yml), that condition
is false, so the .deb pull was silently skipped, the package
directories stayed empty, `dpkg -i .../*.deb` was a no-op, and
wolfprov's configure failed with "could not locate wolfSSL".

The published .debs (ghcr.io/wolfssl/wolfprovider/debs:*) are
public, so anonymous pulls work regardless of which repo's CI
is running. Drop the fork guard. Login is best-effort
(continue-on-error: true) -- it helps rate limits when a token is
available, but anonymous pulls keep working for forks without
write-scope tokens against wolfssl's namespace.

Also use github.actor for the login username instead of
github.repository_owner so the token's actual user is used
(matters on fork runs where repository_owner is the fork owner,
not the actor).

Author: aidangarske

.github/workflows/build-wolfprovider.yml

@@ -109,16 +109,20 @@ jobs:
           rm -f "oras_${ORAS_VERSION}_linux_amd64.tar.gz"
           "$GITHUB_WORKSPACE/.bin/oras" version
 
+      # The wolfprov debs at ghcr.io/wolfssl/wolfprovider/debs:* are
+      # public, so login is best-effort: it helps rate-limits when the
+      # caller has a token, but anonymous pulls still work for forks.
       - name: Login to ghcr.io
-        if: steps.check_artifact.outcome != 'success' && github.repository == 'wolfSSL/wolfProvider'
+        if: steps.check_artifact.outcome != 'success'
+        continue-on-error: true
         run: |
           echo "${{ secrets.GITHUB_TOKEN }}" | oras login \
-            --username ${{ github.repository_owner }} \
+            --username ${{ github.actor }} \
             --password-stdin ghcr.io
 
       # ── Debian build: pull .deb packages from ghcr.io ──
       - name: Download pre-built packages from ghcr.io
-        if: steps.check_artifact.outcome != 'success' && github.repository == 'wolfSSL/wolfProvider' && inputs.build_type == 'debian'
+        if: steps.check_artifact.outcome != 'success' && inputs.build_type == 'debian'
         run: |
           mkdir -p ${{ env.WOLFSSL_PACKAGES_PATH }}
           mkdir -p ${{ env.OPENSSL_PACKAGES_PATH }}
@@ -198,7 +202,7 @@ jobs:
           done
 
       - name: Download WIC images from ghcr.io
-        if: steps.check_artifact.outcome != 'success' && github.repository == 'wolfSSL/wolfProvider' && inputs.build_type == 'yocto'
+        if: steps.check_artifact.outcome != 'success' && inputs.build_type == 'yocto'
         run: |
           mkdir -p ${{ env.YOCTO_IMAGES_PATH }}