Fix backport CI: drop incompatible branding overlays and unify Gradle build.

Older Paper versions use different ServerBuildInfoImpl and PaperVersionFetcher
signatures; keep anticheat overlays only on backports. Run applyPatches and
build in one Gradle invocation so NMS types resolve on 1.21.8/1.21.10.

Co-authored-by: Cursor <cursoragent@cursor.com>

.github/workflows/build.yml

@@ -61,8 +61,7 @@ jobs:
         run: |
           git config --global user.email "no-reply@github.com"
           git config --global user.name "GitHub Actions"
-          ./gradlew applyPatches --stacktrace --no-build-cache
-          ./gradlew build syncPapyrusPaperclipJar --stacktrace --no-build-cache
+          ./gradlew applyPatches build syncPapyrusPaperclipJar --stacktrace --no-build-cache
 
       - name: Upload Test Results
         if: always() && matrix.mc == '26.1.2'

scripts/prepare-papyrus-version.sh

@@ -54,16 +54,16 @@ fi
 git checkout "$PAPYRUS_SOURCE_REF" -- settings.gradle.kts scripts/start.sh SUPPORTED_VERSIONS.txt .github/workflows/build.yml
 
 PAPYRUS_COMMON_PATHS=(
-  papyrus-api/src/main/java/io/papermc/paper/ServerBuildInfo.java
   papyrus-api/src/main/java/io/papermc/paper/event/player/PlayerAnticheatViolationEvent.java
-  papyrus-api/src/main/javadoc/overview.html
   papyrus-server/src/main/java/io/papermc/paper/anticheat
-  papyrus-server/src/main/java/io/papermc/paper/ServerBuildInfoImpl.java
-  papyrus-server/src/main/java/com/destroystokyo/paper/PaperVersionFetcher.java
 )
 
 PAPYRUS_MAIN_ONLY_PATHS=(
   papyrus-api/build.gradle.kts
+  papyrus-api/src/main/java/io/papermc/paper/ServerBuildInfo.java
+  papyrus-api/src/main/javadoc/overview.html
+  papyrus-server/src/main/java/io/papermc/paper/ServerBuildInfoImpl.java
+  papyrus-server/src/main/java/com/destroystokyo/paper/PaperVersionFetcher.java
   test-plugin/build.gradle.kts
   test-plugin/src/main/resources/paper-plugin.yml
   papyrus-server/src/main/java/io/papermc/paper/util/EntityRandomSources.java