ThreadSanitizer: data race in closedir

Same issue as #2457 (closed) this time on Debian 11 with Clang:

WARNING: ThreadSanitizer: data race 
  Write of size 8 at 0x000000000001 by thread T1:
    #0 closedir <null>
    #1 isc_dir_close lib/isc/dir.c:134:8
    #2 dns_dnssec_findmatchingkeys lib/dns/dnssec.c:1514:3
    #3 zone_rekey lib/dns/zone.c:21567:11
    #4 zone_maintenance lib/dns/zone.c:11386:4
    #5 zone_timer lib/dns/zone.c:15039:2
    #6 task_run lib/isc/task.c:827:5
    #7 isc_task_run lib/isc/task.c:907:10
    #8 isc__nm_async_task lib/isc/netmgr/netmgr.c:834:11
    #9 process_netievent lib/isc/netmgr/netmgr.c
    #10 process_queue lib/isc/netmgr/netmgr.c:1007:16
    #11 process_all_queues lib/isc/netmgr/netmgr.c:753:25
    #12 async_cb lib/isc/netmgr/netmgr.c:782:6
    #13 <null> <null>
    #14 isc__trampoline_run lib/isc/trampoline.c:185:11

  Previous read of size 8 at 0x000000000001 by thread T2:
    #0 epoll_ctl <null>
    #1 <null> <null>
    #2 uv_run <null>
    #3 isc__trampoline_run lib/isc/trampoline.c:185:11

  Location is file descriptor 105 created by thread T2 at:
    #0 accept4 <null>
    #1 <null> <null>
    #2 isc__trampoline_run lib/isc/trampoline.c:185:11

  Thread T2 (running) created by main thread at:
    #0 pthread_create <null>
    #1 isc_thread_create lib/isc/thread.c:79:8
    #2 isc__netmgr_create lib/isc/netmgr/netmgr.c:328:3
    #3 isc_managers_create lib/isc/managers.c:36:2
    #4 create_managers bin/named/main.c:920:11
    #5 setup bin/named/main.c:1184:11
    #6 main bin/named/main.c:1452:2

  Thread T2 (running) created by main thread at:
    #0 pthread_create <null>
    #1 isc_thread_create lib/isc/thread.c:79:8
    #2 isc__netmgr_create lib/isc/netmgr/netmgr.c:328:3
    #3 isc_managers_create lib/isc/managers.c:36:2
    #4 create_managers bin/named/main.c:920:11
    #5 setup bin/named/main.c:1184:11
    #6 main bin/named/main.c:1452:2

SUMMARY: ThreadSanitizer: data race in closedir

A blocker for base image upgrade from Debian 10 to Debian 11 (!5367 (merged)).

The solution is to have custom libuv for Debian 11 as have for Fedora already (https://gitlab.isc.org/isc-projects/images/-/merge_requests/112/diffs?commit_id=dd3c9f1d49f98a8d3584ef73478da8e9fdc2fd84).