L1 [bugfix]: reimplemented serialization of SIMD vectors

In this MR a serialization of fvec objects was modified:

1. The save and load routines were override to avoid usage of reinterpret_cast on a fvec object for accessing its elements;
2. Only the first scalar of vector is serialized, the loaded vector will consist from the same elements equal to this scalar

added BugFix CodeOwners Reconstruction labels

requested review from @v.akishina

assigned to @se.gorbunov

added 14 commits

• d563b22b...470b757f - 13 commits from branch computing:master
• 3f37ad42 - L1 [bugfix]: reimplemented serialization of SIMD vectors

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approved this merge request

enabled an automatic merge when the pipeline for 3f37ad42 succeeds

merged