Set up environment on Linux

Install clang-17 compiler using instructions from here:

wget https://apt.llvm.org/llvm.sh
chmod +x llvm.sh
sudo ./llvm.sh 17 all

Build release version of google benchmark library. It doesn't matter which compiler you use to build it. Install google benchmark library with:
```
cmake --build "build" --config Release --target install
```
Enable clang-17 compiler for building labs. If you want to make clang-17 to be the default on a system do the following:
```
sudo update-alternatives --install /usr/bin/cc cc /usr/bin/clang-17 30
sudo update-alternatives --install /usr/bin/c++ c++ /usr/bin/clang++-17 30
```
If you don't want to make it a default, you can pass -DCMAKE_C_COMPILER=clang-17 -DCMAKE_CXX_COMPILER=clang++-17 to the CMake.
Go to any lab and check if local lab builds are working. You can find the CMake commands here.

Set the frequency scaling governor to performance.

sudo cpupower frequency-set --governor performance

(Optional) Install ninja.
```
$ sudo apt install ninja-build
```
You can use it to build labs by passing -G Ninja to the CMake invocation.

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