dpif: Maintain upcall_pid, mtu and hash. #3002

Job	Run time
dpdk gcc (ubuntu-24.04)	1m 46s
libreswan (ubuntu-24.04)	2m 56s
osx clang --disable-ssl	1m 47s
linux deb no dpdk	4m 59s
linux rpm fedora	4m 0s
clang-analyze-cache	11m 0s
linux gcc --disable-ssl	3m 49s
linux clang address,undefined test	16m 44s
linux gcc c99	2m 31s
linux clang c99	2m 46s
linux gcc test	7m 55s
linux gcc test --enable-shared	11m 24s
linux clang test --enable-shared	11m 7s
linux clang --disable-ssl	2m 44s
linux clang check check-dpdk dpdk	18m 49s
linux clang test -ljemalloc	9m 4s
linux gcc dpdk --enable-shared	3m 52s
linux gcc check check-dpdk dpdk	18m 55s
linux gcc --enable-afxdp	2m 42s
linux clang --enable-afxdp	2m 41s
linux gcc test -ljemalloc	8m 8s
linux clang dpdk --enable-shared	4m 5s
linux gcc check-kernel -100	11m 1s
linux clang dpdk-shared --enable-shared	3m 52s
linux gcc m32 --disable-ssl	3m 4s
linux gcc dpdk-shared --enable-shared	3m 57s
linux gcc dpdk-shared	2m 50s
linux clang dpdk-shared	3m 13s
linux gcc check-ovsdb-cluster	7m 4s
linux clang address,undefined check-kernel 100-	22m 41s
linux clang address,undefined check-kernel -100	14m 13s
linux gcc check-offloads 100-	12m 42s
linux gcc check-offloads -100	9m 50s
linux gcc check-kernel 100-	19m 42s
linux gcc dpdk check-afxdp	12m 17s
linux gcc dpdk check-system-tso	12m 22s
linux gcc dpdk check-system-userspace	12m 33s
linux clang address,undefined dpdk check-system-userspace	15m 55s
clang-analyze	11m 0s
	5h 32m 0s

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