Refactor `count_distinct_keys_info` #1118

Job	Run time
Compilation for NanoS, X, S+, and Stax (nanos, $NANOS_SDK)	1m 22s
Compilation for NanoS, X, S+, and Stax (nanox, $NANOX_SDK)	1m 26s
Compilation for NanoS, X, S+, and Stax (nanosp, $NANOSP_SDK)	1m 27s
Compilation for NanoS, X, S+, and Stax (stax, $STAX_SDK)	1m 25s
Unit test	0s
Tests	0s
Tests on mainnet	0s
Tests with the JS library	0s
Tests with the Python library and legacy Bitcoin app	0s
Tests for rust client library	0s
	5m 40s

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