(bug) - Remove third party rubygems registry dependency

Prior to this commit, we relied on actionshub/publish-gem-to-github.
This action would swallow exit codes, and falsely report successful
steps on non-zero exit code.

We have decided to take a manual approach, where we can essentially do
this ourselves and ensure the maintenace of this step.

.github/workflows/gem_release.yml

@@ -48,28 +48,16 @@ jobs:
         run: |
           bundle exec rake build
 
-      - name: "Generate release notes"
-        run: |
-          export GH_HOST=github.com
-          gh extension install chelnak/gh-changelog
-          gh changelog get --latest > OUTPUT.md
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: "Create release"
-        run: |
-          gh release create v${{ steps.get_version.outputs.version }} ./pkg/*.gem --title v${{ steps.get_version.outputs.version }} -F OUTPUT.md
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: "Publish gem to rubygems"
-        run: |
-          gem push ./pkg/*.gem
-        env:
-          GEM_HOST_API_KEY: '${{ secrets.GEM_HOST_API_KEY }}'
-
-      - name: Build and publish to GitHub Package
-        uses: actionshub/publish-gem-to-github@main
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          owner: 'puppetlabs'
+      - name: Publish to GitHub Package
+        run : |
+          echo "Setting up access to RubyGems"
+          mkdir -p ~/.gem
+          touch ~/.gem/credentials
+          chmod 600 ~/.gem/credentials
+        
+          echo "Logging in to GitHub Package Registry"
+          echo "---" > ~/.gem/credentials
+          echo ":github: Bearer ${{ secrets.GITHUB_TOKEN }}" >> ~/.gem/credentials
+
+          echo "Pushing gem to GitHub Package Registry"
+          gem push --key "github" --host "https://rubygems.pkg.github.com/${{github.repository_owner}}" ./pkg/*.gem