dublicate: Implement syevd_batch/heevd_batch via syevd/heevd call

[vlad-perevezentsev]

This PR suggests adding syevd_batch and heevd_batch implementation as a separate function and provide iteration of the batch array within it to avoid allocation of each 2D array before calling syevd and heevd to improve performance and avoid serialization of all host tasks in the queue in MKL call;

Performance of dpnp.eigh on Iris Xe

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[github-actions]

View rendered docs @ https://intelpython.github.io/dpnp/pull/1867/index.html

[vlad-perevezentsev]

Work continued in #1936