openvino_backend doesn't need to be static only

[kirklandsign]

We can allow BUILD_SHARED_LIBS=ON and build shared library.

[pytorch-bot]

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[kirklandsign]

Hi @ynimmaga could use review from openvino team

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[github-actions]

Looks like this PR hasn't been updated in a while so we're going to go ahead and mark this as Stale.
Feel free to remove the Stale label if you feel this was a mistake.
If you are unable to remove the Stale label please contact a maintainer in order to do so.
If you want the bot to never mark this PR stale again, add the no-stale label.
Stale pull requests will automatically be closed after 30 days of inactivity.