[TF:PLUGIN:CAPI] Introduce TPU config ops for plugin.
[TF:PLUGIN:CAPI] Introduce TPU config ops for plugin.

This cl includes the following changes:

- Introduce PluginCoordinationServiceAgent, a wrapper class on top of CoordinationServiceAgent. This is similar to the PluginOpKernelContext introduced in cl/466548963, which allows plugin kernel developers to conveniently develop plugin using the wrapper C++ API.

- Introduce a few more methods for PluginOpKernelContext.

- Introduce REGISTER_WRAPPED_C_OPKERNEL_HOST_MEM_ARGS for kernel registration. This allows specifying args to be placed on host memory.

- Implement the TPU configuration ops as plugin opkernels.

PiperOrigin-RevId: 471275169

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