TestRtpStreamSend: ASAN, fix memory leaks #4692

Job	Run time
ci (ubuntu-20.04, gcc, g++, 20, Release)	7m 43s
ci (ubuntu-20.04, gcc, g++, 20, Debug)	7m 22s
ci (ubuntu-20.04, clang, clang++, 20, Release)	7m 51s
ci (ubuntu-20.04, clang, clang++, 20, Debug)	6m 46s
ci (ubuntu-22.04, gcc, g++, 20, Release)	7m 9s
ci (ubuntu-22.04, gcc, g++, 20, Debug)	6m 25s
ci (ubuntu-22.04, clang, clang++, 20, Release)	9m 16s
ci (ubuntu-22.04, clang, clang++, 20, Debug)	7m 44s
ci (macos-12, gcc, g++, 20, Release)	10m 5s
ci (macos-12, gcc, g++, 20, Debug)	8m 26s
ci (macos-14, clang, clang++, 20, Release)	4m 21s
ci (macos-14, clang, clang++, 20, Debug)	3m 37s
ci (windows-2022, cl, cl, 20, Release)	7m 27s
ci (windows-2022, cl, cl, 20, Debug)	5m 34s
	1h 39m 46s

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