[NPU] Build and install flatbuffers to NPU developer package (#32367)
### Details:
- This is a following PR for
[#30735](https://github.com/openvinotoolkit/openvino/pull/30735),
[#31840](https://github.com/openvinotoolkit/openvino/pull/31840).
- Now npu-plugin depends on the OpenVINO submodule flatbuffers, and it's
link the flatbuffers source code directly. This PR is to decouple
npu-plugin from the OpenVINO (and its submodule's) source code and link
the built binaries. Therefore flatbuffers related libraries and
executions are built and installed for NPU device.
### Tickets:
- E-164884
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Co-authored-by: Maksim Doronin <maksim.doronin@intel.com>