Add l2_norm normalization support to linear retriever#128504

mridula-s109 merged 20 commits intoelastic:mainelastic/elasticsearch:mainfrom

mridula-s109:SEARCH-921-add-l-2-norm-normalization-support-to-linear-retrievermridula-s109/elasticsearch:SEARCH-921-add-l-2-norm-normalization-support-to-linear-retrieverCopy head branch name to clipboard