process SystemFrames in a queue as high priority frames

[aconchillo]

Please describe the changes in your PR. If it is addressing an issue, please reference that as well.

This makes sure SystemFrames are processed in the order received also ensuring that they are processed before other types of frames.

[codecov[bot]]

Codecov Report

:x: Patch coverage is 86.59794% with 13 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/pipecat/processors/frame_processor.py	86.59%	13 Missing :warning:

Files with missing lines	Coverage Δ
src/pipecat/frames/frames.py	95.16% <ø> (ø)
src/pipecat/processors/frame_processor.py	79.56% <86.59%> (+1.65%)	:arrow_up:

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[aconchillo]

Closing. This was fixed in #2358