[Improvement #2490] Add GUARDED_BY to FdEntity and fix locking #1881

Job	Run time
macos12	17m 51s
macos12	18m 46s
macos12	16m 48s
MemoryTest (glibc_debug)	10m 51s
MemoryTest (glibc_debug)	10m 51s
MemoryTest (glibc_debug)	10m 51s
Linux (ubuntu:24.04)	13m 0s
Linux (ubuntu:24.04)	13m 0s
Linux (ubuntu:24.04)	13m 0s
MemoryTest (sanitize_address)	14m 37s
MemoryTest (sanitize_address)	11m 51s
MemoryTest (sanitize_address)	11m 51s
Linux (ubuntu:22.04)	12m 28s
Linux (ubuntu:22.04)	12m 28s
Linux (ubuntu:22.04)	12m 28s
MemoryTest (sanitize_others)	10m 22s
MemoryTest (sanitize_others)	10m 22s
MemoryTest (sanitize_others)	10m 22s
MemoryTest (sanitize_thread)	3m 12s
MemoryTest (sanitize_thread)	7m 24s
MemoryTest (sanitize_thread)	7m 24s
Linux (ubuntu:20.04)	10m 4s
Linux (ubuntu:20.04)	10m 4s
Linux (ubuntu:20.04)	10m 4s
MemoryTest (valgrind)	23m 54s
MemoryTest (valgrind)	23m 54s
MemoryTest (valgrind)	23m 54s
Linux (debian:bookworm)	12m 28s
Linux (debian:bookworm)	12m 28s
Linux (debian:bookworm)	12m 28s
Linux (debian:bullseye)	9m 44s
Linux (debian:bullseye)	9m 44s
Linux (debian:bullseye)	9m 44s
Linux (rockylinux:9)	12m 49s
Linux (rockylinux:9)	12m 49s
Linux (rockylinux:9)	12m 49s
Linux (rockylinux:8)	14m 1s
Linux (rockylinux:8)	14m 1s
Linux (rockylinux:8)	14m 1s
Linux (fedora:40)	13m 12s
Linux (fedora:40)	13m 12s
Linux (fedora:40)	13m 12s
Linux (fedora:39)	17m 24s
Linux (fedora:39)	17m 24s
Linux (fedora:39)	17m 24s
Linux (opensuse/leap:15)	12m 5s
Linux (opensuse/leap:15)	12m 5s
Linux (opensuse/leap:15)	12m 5s
Linux (alpine:3.20)	18m 53s
Linux (alpine:3.20)	18m 53s
Linux (alpine:3.20)	18m 53s
	11h 23m 29s

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