LLVM repository does not contain any Bolt binaries

```
bazel query "@@toolchains_llvm++llvm+llvm_toolchain//:*" | grep bin
Loading: 0 packages loaded
@llvm_toolchain//:bin
@llvm_toolchain//:bin/cc_wrapper.sh
@llvm_toolchain//:bin/clang-cpp
@llvm_toolchain//:bin/clang-format
@llvm_toolchain//:bin/clang-tidy
@llvm_toolchain//:bin/clangd
@llvm_toolchain//:bin/ld.lld
@llvm_toolchain//:bin/llvm-ar
@llvm_toolchain//:bin/llvm-cov
@llvm_toolchain//:bin/llvm-dwp
@llvm_toolchain//:bin/llvm-nm
@llvm_toolchain//:bin/llvm-objcopy
@llvm_toolchain//:bin/llvm-objdump
@llvm_toolchain//:bin/llvm-profdata
@llvm_toolchain//:bin/llvm-strip
```

Regular LLVM releases downloaded from GitHub contain bolt binaries.

Start with the Bazel query shown in the issue and compare the repository's downloaded LLVM contents with a regular LLVM release from GitHub. Trace how the LLVM toolchain exposes binaries, then verify that Bolt binaries appear in the queried targets and downloaded toolchain.

Written by the indexing model from the issue text.