build

Enable ArrayMetadataStore by default #18176

Job	Run time
build-checkpoint (Python 3.10, jax=newest)	1m 11s
build-orbax-model (Python 3.12, jax=newest)	44s
build-checkpoint (Python 3.11, jax=newest)	1m 7s
build-export (Python 3.10, jax=newest)	1m 35s
build-checkpoint (Python 3.12, jax=newest)	1m 12s
build-export (Python 3.11, jax=newest)	1m 29s
build-export (Python 3.12, jax=newest)	1m 40s
build-checkpoint (Python 3.10, jax=0.5.0)	1m 12s
build-export (Python 3.10, jax=0.4.34)	1m 34s
build-checkpoint (Python 3.13, jax=nightly)	1m 15s
build-export (Python 3.12, jax=nightly)	1m 38s
	14m 37s

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