Refactor workflows: split pull request build, rename deploy, and remove unused steps

Signed-off-by: Chaoscaot <max@maxsp.de>

.gitea/workflows/backport-commoncore.yml

@@ -106,7 +106,6 @@ jobs:
 
           git config --global user.name "SteamWar Backport Bot"
           git config --global user.email "backport-bot@steamwar.de"
-          git config --global http.extraHeader "Authorization: token ${GITEA_TOKEN}"
           git fetch origin '+refs/heads/*:refs/remotes/origin/*'
 
           for commit in "${source_commits[@]}"; do
@@ -190,7 +189,7 @@ jobs:
           Source PR: ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/pulls/${pr_number}
           ${source_text}
 
-          This PR will be merged automatically by the Build workflow after a successful build.
+          This PR will be merged automatically by the Pull Request Build workflow after a successful build.
           BODY
           )"