Unable to build nginx with symlinks in some environments

[nydr]

Error reported in slack.

Describe the bug

When running npm run build-service-images on master, building the nginx container fails with the following error:

Logs

Step 18/20 : RUN bats /app/tests/ssl-install.bats
 ---> Running in 7e09ababbb22
1..7
not ok 1 ssl selection script can run
# (from function `setup' in test file /app/tests/ssl-install.bats, line 1)
#   `setup() {' failed
# bats_load_safe: Could not find '/app/tests/test_helper/bats-support/load'[.bash]
# /app/tests/ssl-install.bats: line 25: shellmock_clean: command not found
not ok 2 if CERTIFICATE_MODE environment variable is not set we return an error message
# (from function `setup' in test file /app/tests/ssl-install.bats, line 1)
#   `setup() {' failed
# bats_load_safe: Could not find '/app/tests/test_helper/bats-support/load'[.bash]
# /app/tests/ssl-install.bats: line 25: shellmock_clean: command not found
not ok 3 Bring your own cert mode but certificates not provided returns an appropriate error message
# (from function `setup' in test file /app/tests/ssl-install.bats, line 1)
#   `setup() {' failed
# bats_load_safe: Could not find '/app/tests/test_helper/bats-support/load'[.bash]
# /app/tests/ssl-install.bats: line 25: shellmock_clean: command not found
not ok 4 Bring your own cert mode with certificates set succeeds
# (from function `setup' in test file /app/tests/ssl-install.bats, line 1)
#   `setup() {' failed
# bats_load_safe: Could not find '/app/tests/test_helper/bats-support/load'[.bash]
# /app/tests/ssl-install.bats: line 25: shellmock_clean: command not found
not ok 5 SSL cert generation works if the CERTIFICATE_MODE is set to SELF_SIGNED
# (from function `setup' in test file /app/tests/ssl-install.bats, line 1)
#   `setup() {' failed
# bats_load_safe: Could not find '/app/tests/test_helper/bats-support/load'[.bash]
# /app/tests/ssl-install.bats: line 25: shellmock_clean: command not found
not ok 6 If self signed certificate exists we do not create a new one
# (from function `setup' in test file /app/tests/ssl-install.bats, line 1)
#   `setup() {' failed
# bats_load_safe: Could not find '/app/tests/test_helper/bats-support/load'[.bash]
# /app/tests/ssl-install.bats: line 25: shellmock_clean: command not found
not ok 7 SSL certificate auto generation does not generate a new certificate if one exists
# (from function `setup' in test file /app/tests/ssl-install.bats, line 1)
#   `setup() {' failed
# bats_load_safe: Could not find '/app/tests/test_helper/bats-support/load'[.bash]
# /app/tests/ssl-install.bats: line 25: shellmock_clean: command not found
The command '/bin/sh -c bats /app/tests/ssl-install.bats' returned a non-zero code: 1

Environment
Problem has been observed in:
Docker version 24.0.5, build ced0996600
Manjaro, Linux

Additional context

Workaround:
replace symlink with actual folder

rm nginx/tests/test_helper haproxy/tests/test_helper
cp -r scripts/test/bats/test_helper nginx/tests/
cp -r scripts/test/bats/test_helper haproxy/tests/

[nydr]

Issue introduced in #8446