Github Actions failing on GPG checks from -ea downloads of boot JDK

[sxa]

What are you trying to do? Get a PR into this repository

Expected behaviour: All checks pass unless I've broken something

Observed behaviour: Github checks do not pass, and it's not my fault™

Any other comments:
Reference from https://github.com/adoptium/temurin-build/actions/runs/7802907745/job/21281465300?pr=3569 on #3569
I initially saw an issue with the checks as part of #3630 but that was not believed to be the cause of the failure.

Downloading GA release of boot JDK version 22 failed.
Attempting to download EA release of boot JDK version 22 from https://api.adoptium.net/v3/binary/latest/22/ea/linux/x64/jdk/hotspot/normal/adoptium
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0

  0  197M    0 45684    0     0  51620      0  1:06:54 --:--:--  1:06:54 51620
 27  197M   27 54.3M    0     0  28.8M      0  0:00:06  0:00:01  0:00:05 54.2M
 54  197M   54  108M    0     0  37.5M      0  0:00:05  0:00:02  0:00:03 54.2M
 82  197M   82  163M    0     0  42.0M      0  0:00:04  0:00:03  0:00:01 54.4M
100  197M  100  197M    0     0  43.7M      0  0:00:04  0:00:04 --:--:-- 54.4M
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0

100   310  100   310    0     0    540      0 --:--:-- --:--:-- --:--:--   540
gpg: keyblock resource `/__w/temurin-build/temurin-build/.gpg-temp/secring.gpg': No such file or directory
gpg: keyblock resource `/__w/temurin-build/temurin-build/.gpg-temp/pubring.gpg': No such file or directory
gpg: requesting key 65F8F04B from hkp server keyserver.ubuntu.com
gpg: no writable keyring found: Unknown system error
gpg: error reading `[stream]': General error
gpg: Total number processed: 0
gpg: keyblock resource `/__w/temurin-build/temurin-build/.gpg-temp/secring.gpg': No such file or directory
gpg: keyblock resource `/__w/temurin-build/temurin-build/.gpg-temp/pubring.gpg': No such file or directory
gpg: key "3B04D753C9050D9A5D343F39843C48A565F8F04B" not found: No public key
gpg: keyblock resource `/__w/temurin-build/temurin-build/.gpg-temp/pubring.gpg': No such file or directory
gpg: Signature made Fri Jan 26 14:33:59 2024 UTC using RSA key ID 65F8F04B
gpg: Can't check signature: No public key
Error: Process completed with exit code 1.