Merge branch 'release-script-idempotent' into 'main'

Make release script more robust

See merge request components/opentofu!275

.gitlab/scripts/release.sh

@@ -30,7 +30,7 @@ echo "Updating default value for version input to match ${version} ..."
 
 "${script_dir}/update-self-version.sh" "${version}"
 
-git commit templates/*.yml -m "Update version input default for ${version} release"
+git commit templates/*.yml -m "Update version input default for ${version} release" || echo "Nothing to commit, skipping it ..."
 git push -o ci.skip origin main
 
 echo "Determing last stable version ..."
@@ -55,7 +55,7 @@ echo "Pulling changelog ..."
 git pull
 
 echo "Tagging ${version} ..."
-git tag "${version}"
+git tag "${version}" || echo "Release tag already exists, skipping it ..."
 
 echo "Pushing tag ${version} ..."