add unit test for mapping packets with lower sequence number than the first mapped packet #4766

Job	Run time
ci (ubuntu-20.04, 18, Release)	2m 30s
ci (ubuntu-20.04, 18, Debug)	2m 36s
ci (ubuntu-22.04, 20, Release)	2m 29s
ci (ubuntu-22.04, 20, Debug)	2m 25s
ci (ubuntu-22.04, 22, Release)	1s
ci (ubuntu-22.04, 22, Debug)	2m 25s
ci (ubuntu-24.04, 22, -Db_sanitize=address, Release)	1s
ci (ubuntu-24.04, 22, -Db_sanitize=address, Debug)	1m 15s
ci (ubuntu-24.04, 22, -Db_sanitize=undefined, Release)	2m 15s
ci (ubuntu-24.04, 22, -Db_sanitize=undefined, Debug)	1s
ci (ubuntu-24.04, 22, -Db_sanitize=thread, Release)	1s
ci (ubuntu-24.04, 22, -Db_sanitize=thread, Debug)	1s
ci (macos-12, 18, Release)	2m 14s
ci (macos-12, 18, Debug)	1m 16s
ci (macos-14, 20, Release)	1s
ci (macos-14, 20, Debug)	2m 15s
ci (macos-14, 22, Release)	1s
ci (macos-14, 22, Debug)	1s
ci (windows-2022, 20, Release)	1s
ci (windows-2022, 20, Debug)	1m 6s
ci (windows-2022, 22, Release)	1s
ci (windows-2022, 22, Debug)	1s
	22m 57s

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