Changed multiple Head requests from S3fsMultiCurl to ThreadPoolMan #2351

Job	Run time
MemoryTest (glibc_debug)	12m 24s
MemoryTest (sanitize_address)	13m 57s
clang-tidy	7m 2s
macos12	19m 0s
MemoryTest (sanitize_others)	12m 52s
Linux (ubuntu:24.10)	12m 13s
MemoryTest (sanitize_thread)	14m 45s
Linux (ubuntu:24.04)	12m 21s
MemoryTest (thread_safety)	12m 44s
Linux (ubuntu:22.04)	12m 10s
Linux (ubuntu:20.04)	11m 52s
MemoryTest (valgrind)	23m 50s
Linux (debian:bookworm)	13m 11s
Linux (debian:bullseye)	12m 10s
Linux (rockylinux:9)	12m 28s
Linux (rockylinux:8)	13m 28s
Linux (fedora:41)	12m 28s
Linux (fedora:40)	12m 44s
Linux (opensuse/leap:15)	13m 37s
Linux (alpine:3.20)	13m 2s
	4h 28m 18s

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