Fix CI: Remove build artifacts and untrack library sources to force fresh clone

Author: oleglazari

.gitignore

@@ -0,0 +1,34 @@
+# Build directories
+build/
+build_*/
+
+# Compiled Object files
+*.o
+*.a
+*.so
+*.dylib
+*.dll
+*.exe
+
+# CMake
+CMakeCache.txt
+CMakeFiles/
+cmake_install.cmake
+Makefile
+*.cmake
+!CMakeLists.txt
+
+# Editor / IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Allocator specific (exclude the source dirs if they are submodules, but here they seem to be cloned)
+# We want to ignore build artifacts inside allocators
+allocators/*/out/
+allocators/*/bin/
+allocators/*/lib/
+allocators/*/obj/