VP8: do not forward RTP packets which payload contains a higher temporal layer than current one. #4835

Job	Run time
ci (ubuntu-20.04, gcc, g++, true, true, false, true, 22, Release)	23m 34s
ci (ubuntu-20.04, gcc, g++, true, true, false, true, 22, Debug)	19m 32s
ci (ubuntu-20.04, clang, clang++, true, true, true, true, 22, Release)	29m 35s
ci (ubuntu-20.04, clang, clang++, true, true, true, true, 22, Debug)	23m 17s
ci (ubuntu-22.04, gcc, g++, true, false, true, 22, Release)	20m 52s
ci (ubuntu-22.04, gcc, g++, true, false, true, 22, Debug)	16m 45s
ci (ubuntu-22.04, clang, clang++, true, true, true, 22, Release)	32m 19s
ci (ubuntu-22.04, clang, clang++, true, true, true, 22, Debug)	25m 14s
ci (ubuntu-24.04, gcc, g++, true, true, false, true, 22, Release)	20m 55s
ci (ubuntu-24.04, gcc, g++, true, true, false, true, 22, Debug)	15m 50s
ci (ubuntu-24.04, clang, clang++, true, true, true, true, 22, Release)	34m 10s
ci (ubuntu-24.04, clang, clang++, true, true, true, true, 22, Debug)	29m 5s
ci (macos-13, gcc, g++, true, false, false, false, 22, Release)	12m 17s
ci (macos-13, gcc, g++, true, false, false, false, 22, Debug)	7m 42s
ci (macos-14, clang, clang++, true, false, false, false, 22, Release)	4m 58s
ci (macos-14, clang, clang++, true, false, false, false, 22, Debug)	4m 27s
ci (macos-15, clang, clang++, true, false, false, false, 22, Release)	4m 3s
ci (macos-15, clang, clang++, true, false, false, false, 22, Debug)	5m 14s
ci (windows-2022, cl, cl, false, false, false, 22, Release)	7m 54s
ci (windows-2022, cl, cl, false, false, false, 22, Debug)	6m 54s
	5h 44m 37s

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