Add retry option to curl calls to prevent some fails

Ready for review. Pipeline: https://git.drupalcode.org/project/gitlab_templates/-/pipelines/550062

This is going to be almost impossible to replicate (force the 429), but if the jobs continue working as before it means that the option is well added.

Job using the new option: https://git.drupalcode.org/project/keycdn/-/jobs/5922675

Nice to see the new big clear message:

curl: (22) The requested URL returned error: 429
****************************************************************************************
[ERROR] Curl failure
DRUPALORG_CI_SERVER_URL=https://git.drupalcode.org
_CURL_TEMPLATES_REPO=project/gitlab_templates
_CURL_TEMPLATES_REF=default-ref
FILENAME=assets/phpstan.neon
FULL_URL=https://git.drupalcode.org/project/gitlab_templates/-/raw/default-ref/as...

Job ending with EXIT_CODE=22
****************************************************************************************

impossible to replicate (force the 429)

Yes :-) Does the log show any "retrying ..." line if there is a failure on first attempt? If so, maybe we can look out for that? Or even add some job to scan the log artifact file (if that's even possible).

RTBC anyway, then let's see if/what we get if we spot a 429

There was a GTD failure in one of the phpunit jobs but was not related to curl. I re-ran and it passed.

Yeah it was great to see such clear output in the log. Thanks for that addition!!
I'm not sure what the log will show in the case of retrying, but I guess we'll find out if/when it happens next.

Merged.