Enable PJRT C API Client and other changes for Neuron (#5428)
* Enable PJRT C API Client and other changes for Neuron
* keeping quotes consistent
* fixing device type call
* refactoring neuron initialization with spawn
* updating replication setting only for torchrun
* removing set replication in xla backed was added to rendezvous handler
* removing workaround for world_size/master_port for neuron
* fixing linter issues
