remove legacy indexer integration test crate #62875

Job	Run time
rust-doc-tests	4m 33s
file_change_determinator	10s
rust-consensus-only-smoke-test	0s
rust-consensus-only-unit-test	0s
rust-unit-tests	0s
rust-cargo-deny	1m 48s
rust-lints	3m 19s
general-lints	1m 43s
rust-smoke-tests	25m 48s
rust-build-cached-packages	1m 59s
rust-cryptohasher-domain-separation-check	0s
rust-targeted-unit-tests	15m 29s
	54m 49s

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