remove legacy indexer integration test crate #62789

Job	Run time
file_change_determinator	12s
rust-doc-tests	5m 11s
rust-consensus-only-unit-test	0s
rust-unit-tests	0s
rust-consensus-only-smoke-test	0s
rust-cargo-deny	2m 1s
rust-lints	3m 18s
general-lints	1m 37s
rust-smoke-tests	24m 54s
rust-build-cached-packages	1m 57s
rust-cryptohasher-domain-separation-check	0s
rust-targeted-unit-tests	16m 33s
	55m 43s

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