Migrate SplitCore and SplitShard to Jax-rs#4179

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epugh:copilot/migrate-splitcoreapi-to-jaxrs

Commits on Mar 2, 2026

Update SplitShardAPITest and SplitCoreAPITest to use generated SolrJ client via getSolrClient()

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Fix TestCollectionAPIs.testCommands: remove obsolete split command tests after JAX-RS migration

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Fix TestApiFramework.testFramework: remove obsolete split command checks after JAX-RS migration

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Commits on Mar 3, 2026

doc change
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