feat: perform go path repo move

* Change the go module path
   from github.com/csaf-poc/csaf_distribution to github.com/gocsaf/csaf.
 * Rename archive for release tarballs.
 * Adjust testing scripts and documentation.

.github/workflows/itest.yml

@@ -25,7 +25,7 @@ jobs:
           sudo apt install -y make nginx fcgiwrap gnutls-bin
           cp -r $GITHUB_WORKSPACE ~
           cd ~
-          cd csaf_distribution/docs/scripts/
+          cd csaf/docs/scripts/
           # keep in sync with docs/scripts/Readme.md
           export FOLDERNAME=devca1 ORGANAME="CSAF Tools Development (internal)"
           source ./TLSConfigsForITest.sh

.github/workflows/release.yml

@@ -24,5 +24,5 @@ jobs:
         uses: softprops/action-gh-release@v1
         with:
             files: |
-                dist/csaf_distribution-*.zip
-                dist/csaf_distribution-*.tar.gz
+                dist/csaf-*.zip
+                dist/csaf-*.tar.gz