[polly] [Polly] Allocate packed arrays of matrix multiplication on heap (PR #226163)

[Timur Baidusenov via llvm-commits]

bai-tim wrote:

> LGTM
> 
> Would you like me to land it? (consider resolving the merge conflict in ReleaseNotes.txt so I don't have to do this)

Yes, you can land this

https://github.com/llvm/llvm-project/pull/226163