route-table: Use ofpbuf_use_const() for multipath attributes. #2610

Job	Run time
libreswan (ubuntu-24.04)	5s
dpdk gcc (ubuntu-24.04)	5s
linux deb no dpdk	10m 31s
linux rpm fedora	4m 12s
build oss-fuzz fuzzers	2m 55s
osx clang --disable-ssl	2m 6s
clang-analyze-cache	13m 5s
linux gcc --disable-ssl	2m 40s
linux clang --disable-ssl	2m 41s
linux gcc c99	2m 42s
linux clang c99	2m 41s
linux gcc test	8m 29s
linux clang address,undefined test	16m 32s
linux gcc test --enable-shared	11m 10s
linux clang test --enable-shared	10m 57s
linux gcc check check-dpdk dpdk	19m 55s
linux clang check check-dpdk dpdk	19m 41s
linux gcc test -ljemalloc	9m 4s
linux clang test -ljemalloc	8m 54s
linux gcc --enable-afxdp	3m 53s
linux clang --enable-afxdp	2m 48s
linux gcc dpdk --enable-shared	3m 44s
linux clang dpdk --enable-shared	4m 5s
linux gcc dpdk-shared	2m 50s
linux clang dpdk-shared	2m 54s
linux gcc dpdk-shared --enable-shared	3m 38s
linux clang dpdk-shared --enable-shared	3m 55s
linux gcc m32 --disable-ssl	2m 33s
linux gcc check-ovsdb-cluster	6m 49s
linux gcc check-kernel -100	10m 44s
linux gcc check-kernel 100-	20m 52s
linux clang address,undefined check-kernel -100	12m 56s
linux clang address,undefined check-kernel 100-	20m 28s
linux gcc check-offloads -100	9m 46s
linux gcc check-offloads 100-	12m 2s
linux gcc dpdk check-system-userspace	12m 29s
linux clang address,undefined dpdk check-system-userspace	17m 9s
linux gcc dpdk check-system-tso	12m 39s
linux gcc dpdk check-afxdp	12m 16s
clang-analyze	10m 32s
	5h 37m 27s

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