build(py): add target that publishes to PyPI #2888

Job	Run time
no-labels	1s
ci-ready-to-merge	2s
ci-run	2s
ci-run-full	2s
call-ci / Bazel msan (presubmit)	22m 39s
call-ci / Bazel (presubmit)	20m 28s
call-ci / Bazel asan (presubmit)	20m 13s
call-ci / Bazel TFLite Tools (presubmit)	2m 39s
call-ci / Cortex-M Bluepill No Release (presubmit)	15m 58s
call-ci / Cortex-M Bluepill Release (presubmit)	12m 0s
call-ci / Code Style (presubmit)	1m 38s
call-ci / Cortex-M QEMU Unit Tests (presubmit)	11m 33s
call-ci / Cortex-M Bluepill Renode (presubmit)	8m 7s
call-ci / Project Generation (presubmit)	15m 15s
call-ci / Makefile x86 Default (presubmit)	9m 16s
call-ci / Makefile x86 Out Of Tree (presubmit)	7m 34s
call-ci / Makefile x86 Release (presubmit)	20m 30s
call-ci / Makefile x86 No TFLite Static Memory (presubmit)	11m 54s
call-check-tflite-files / Check PR Modifies TfLite Files	49s
call-hexagon / Hexagon Build Test (presubmit)	15m 9s
call-xtensa-presubmit / Hifi5 Unit Tests (presubmit)	25m 7s
call-xtensa-presubmit / Vision P6 Build (presubmit)	17m 16s
call-xtensa-presubmit / Hifi3z Unit Tests (presubmit)	35m 58s
PR has Bug	1s
	4h 34m 11s

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