build: Use clang-19 on the worker, and cleanup some symlinks I commited in error.

.gitea/workflows/build.yaml

@@ -18,7 +18,7 @@ jobs:
         run: >
           apt update && apt install -y \
             build-essential \
-            clang \
+            clang-19 \
             cmake \
             curl \
             docker.io \
@@ -40,9 +40,11 @@ jobs:
           submodules: true
       - name: Setup environment
         run: |
+          update-alternatives --install /usr/bin/clang clang /usr/bin/clang-19 100
+          update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-19 100
           ln -s /opt/keys .keys
-          ln -s /opt/deps/ios_toolchain deps/ios_toolchain
-          ln -s /opt/deps/macos_toolchain deps/macos_toolchain
+          ln -sf /opt/deps/ios_toolchain deps/
+          ln -sf /opt/deps/macos_toolchain deps/
       - name: Build documentation
         run: |
           mkdir -p out/html/ ~/.ssh/

deps/ios_toolchain

@@ -1 +0,0 @@
-/opt/deps/ios_toolchain/

deps/macos_toolchain

@@ -1 +0,0 @@
-/opt/deps/macos_toolchain/