Add enum class skgpu::graphite::MarkFrameBoundary to be used to specify whether a submission is the last logical submission for a frame.

Add struct skgpu::graphite::SubmitInfo to hold metadata used for submitting workloads for execution. Allow specifying through skgpu::graphite::SubmitInfo whether submission is a frame boundary (last logical submission for a frame) and frameID (uint64_t) with default values to match prior behavior.

Use struct skgpu::graphite::SubmitInfo in skgpu::graphite::QueueManager::submitToGpu, skgpu::graphite::QueueManager::onSubmitToGpu and all derived classes.