Enable LLDB debug info tests on CI

Author: EFanZh

src/ci/docker/host-x86_64/x86_64-gnu-llvm-19/Dockerfile

@@ -16,6 +16,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   cmake \
   sudo \
   gdb \
+  lldb-19 \
   llvm-19-tools \
   llvm-19-dev \
   libedit-dev \
@@ -46,12 +47,14 @@ RUN sh /scripts/sccache.sh
 # LLVM, rather than the typical src/llvm-project LLVM.
 ENV NO_DOWNLOAD_CI_LLVM 1
 ENV EXTERNAL_LLVM 1
+ENV PYTHONPATH=/usr/lib/llvm-19/lib/python3/dist-packages
 
 # Using llvm-link-shared due to libffi issues -- see #34486
 ENV RUST_CONFIGURE_ARGS \
       --build=x86_64-unknown-linux-gnu \
       --llvm-root=/usr/lib/llvm-19 \
       --enable-llvm-link-shared \
+      --set build.lldb=lldb-19 \
       --set rust.randomize-layout=true \
       --set rust.thin-lto-import-instr-limit=10
 

src/ci/docker/host-x86_64/x86_64-gnu-llvm-20/Dockerfile

@@ -16,6 +16,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   cmake \
   sudo \
   gdb \
+  lldb-20 \
   llvm-20-tools \
   llvm-20-dev \
   libedit-dev \
@@ -46,12 +47,14 @@ RUN sh /scripts/sccache.sh
 # LLVM, rather than the typical src/llvm-project LLVM.
 ENV NO_DOWNLOAD_CI_LLVM 1
 ENV EXTERNAL_LLVM 1
+ENV PYTHONPATH=/usr/lib/llvm-20/lib/python3/dist-packages
 
 # Using llvm-link-shared due to libffi issues -- see #34486
 ENV RUST_CONFIGURE_ARGS \
       --build=x86_64-unknown-linux-gnu \
       --llvm-root=/usr/lib/llvm-20 \
       --enable-llvm-link-shared \
+      --set build.lldb=lldb-20 \
       --set rust.randomize-layout=true \
       --set rust.thin-lto-import-instr-limit=10