build(ci): use official goplus/llgo v0.12.2 instead of fork (#665)

Switch CI download URL from luoliwoshang/llgo fork to official
goplus/llgo releases, and update version from v0.12.14 to v0.12.2
across all workflow files and the setup action.

Closes #664

Generated with [codeagent](https://github.com/qbox/codeagent)

Co-authored-by: xgopilot <noreply@goplus.org>
Co-authored-by: luoliwoshang <51194195+luoliwoshang@users.noreply.github.com>

Author: 3 people

.github/actions/setup-llcppg/action.yml

@@ -8,8 +8,8 @@ inputs:
     description: "LLVM version to install (e.g. 18)"
     default: "19"
   llgo:
-    description: "LLGo version to download (e.g. v0.12.14)"
-    default: "v0.12.14"
+    description: "LLGo version to download (e.g. v0.12.2)"
+    default: "v0.12.2"
 runs:
   using: "composite"
   steps:

.github/actions/setup-llcppg/download-llgo.sh

@@ -39,8 +39,7 @@ esac
 # Remove 'v' prefix from version if present
 VERSION_NUMBER="${VERSION#v}"
 FILENAME="llgo${VERSION_NUMBER}.${OS}-${ARCH}.tar.gz"
-# Use fork releases while upstream release is not available yet.
-URL="https://github.com/luoliwoshang/llgo/releases/download/${VERSION}/${FILENAME}"
+URL="https://github.com/goplus/llgo/releases/download/${VERSION}/${FILENAME}"
 
 echo "Downloading LLGo ${VERSION} for ${OS}-${ARCH}..."
 echo "URL: $URL"

.github/workflows/end2end.yml

@@ -24,7 +24,7 @@ jobs:
           - ubuntu-latest
           - ubuntu-24.04-arm
         llvm: [19]
-        llgo: [v0.12.14]
+        llgo: [v0.12.2]
         go: [1.23]
       fail-fast: false
     runs-on: ${{matrix.os}}

.github/workflows/gentest.yml

@@ -24,7 +24,7 @@ jobs:
           - ubuntu-latest
           - ubuntu-24.04-arm
         llvm: [19]
-        llgo: [v0.12.14]
+        llgo: [v0.12.2]
         go: [1.23]
       fail-fast: false
     runs-on: ${{matrix.os}}

.github/workflows/go.yml

@@ -25,7 +25,7 @@ jobs:
           - macos-latest
           - ubuntu-latest
         llvm: [19]
-        llgo: [v0.12.14]
+        llgo: [v0.12.2]
         go: [1.23]
       fail-fast: false
     runs-on: ${{matrix.os}}