Encode examples before writing them in the ShardBasedBuilder #11322

Job	Run time
Check whether we should run tests or not	12s
Github API tests	2m 30s
HuggingFace Python 3.10 tests	3m 13s
Notebook tests	7m 30s
Core TFDS tests / Generate shards	3s
Core TFDS tests / [Python 3.12][1/4]	6m 54s
Core TFDS tests / [Python 3.11][1/4]	7m 0s
Core TFDS tests / [Python 3.12][2/4]	6m 50s
Core TFDS tests / [Python 3.10][1/4]	6m 28s
Core TFDS tests / [Python 3.10][3/4]	8m 13s
Core TFDS tests / [Python 3.10][2/4]	5m 39s
Core TFDS tests / [Python 3.11][2/4]	5m 35s
Core TFDS tests / [Python 3.12][4/4]	6m 55s
Core TFDS tests / [Python 3.10][4/4]	5m 41s
Core TFDS tests / [Python 3.11][4/4]	8m 8s
Core TFDS tests / [Python 3.11][3/4]	8m 14s
Core TFDS tests / [Python 3.12][3/4]	9m 35s
	1h 38m 40s

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