codegen: Add TFLiteContext and TfLiteNodes #2944

Job	Run time
no-labels	1s
ci-ready-to-merge	2s
ci-run	3s
ci-run-full	1s
call-hexagon / Hexagon Build Test (presubmit)	14m 10s
call-ci / Bazel (presubmit)	28m 52s
call-ci / Bazel TFLite Tools (presubmit)	3m 2s
call-ci / Bazel msan (presubmit)	17m 26s
call-ci / Bazel asan (presubmit)	17m 45s
call-ci / Cortex-M Bluepill Release (presubmit)	11m 58s
call-ci / Cortex-M Bluepill No Release (presubmit)	16m 15s
call-ci / Cortex-M QEMU Unit Tests (presubmit)	15m 17s
call-ci / Cortex-M Bluepill Renode (presubmit)	7m 1s
call-ci / Project Generation (presubmit)	11m 51s
call-ci / Makefile x86 Release (presubmit)	19m 10s
call-ci / Makefile x86 Default (presubmit)	11m 5s
call-ci / Code Style (presubmit)	1m 31s
call-ci / Makefile x86 No TFLite Static Memory (presubmit)	8m 8s
call-ci / Makefile x86 Out Of Tree (presubmit)	6m 2s
call-xtensa-presubmit / Vision P6 Build (presubmit)	15m 34s
call-xtensa-presubmit / Hifi3z Unit Tests (presubmit)	32m 18s
call-xtensa-presubmit / Hifi5 Unit Tests (presubmit)	17m 22s
call-check-tflite-files / Check PR Modifies TfLite Files	1m 3s
PR has Bug	1s
	4h 15m 58s

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