[llvm] [IR2Vec] Exposing Embedding as an data type wrapped around std::vector<double> (PR #143197)

[S. VenkataKeerthy via llvm-commits]

svkeerthy wrote:

> ADT has a well defined meaning in LLVM. On reading the title I expected something new to be added to llvm/ADT but this is local to IR2Vec. Can you drop the usage of ADT in the title and code?

Okay

https://github.com/llvm/llvm-project/pull/143197