Bump rust-rocksdb to 0.19.0 tag (backport #26949)

[mergify]

This is an automatic backport of pull request #26949 done by Mergify.
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	modified:   ledger/Cargo.toml
	modified:   programs/bpf/Cargo.lock

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	both modified:   Cargo.lock
	both modified:   ledger/src/blockstore_db.rs

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[mergify]

automerge label removed due to a CI failure

[mergify]

automerge label removed due to a CI failure

[steviez]

Abandoning this PR in light of https://discord.com/channels/428295358100013066/560503042458517505/1007332476311588874

Cargo v1.60 added fields to the crate index format, so crates published using those fields can't be found by earlier versions of rust. The last three version of librocksdb-sys have used the new format (and a totally different versioning pattern, incidentally)