Rollup merge of #128367 - ojeda:rfl-ci-build-doctests-and-docs, r=Kobzol

CI: rfl: build the generated doctests and documentation

Cc ``@tgross35``
r? ``@Kobzol``
try-job: x86_64-rust-for-linux

Author: matthiaskrgr

src/ci/docker/scripts/rfl-build.sh

@@ -65,4 +65,8 @@ make -C linux LLVM=1 -j$(($(nproc) + 1)) \
 make -C linux LLVM=1 -j$(($(nproc) + 1)) \
     samples/rust/rust_minimal.o \
     samples/rust/rust_print.o \
-    drivers/net/phy/ax88796b_rust.o
+    drivers/net/phy/ax88796b_rust.o \
+    rust/doctests_kernel_generated.o
+
+make -C linux LLVM=1 -j$(($(nproc) + 1)) \
+    rustdoc