Reduce export rate limit to once every 3 hours

Part of https://gitlab.com/gitlab-org/gitter/webapp/-/issues/1899
12 jobs for !1987 with 1899-reduce-rate-limit-to-1-per-3-hours in 27 minutes and 46 seconds (queued for 1 second)
detached
Status Job ID Name Coverage
  Build Unit Test
passed #681503271
gitlab-org
package

00:07:17

passed #681503268
gitlab-org
test

00:12:08

manual #681503270
internal allowed to fail manual
test_e2e
passed #681503267
gitlab-org
validate

00:05:55

 
  Pre Deploy
passed #681503273
gitlab-org
distribute_beta_staging

00:00:41

 
  Deploy
passed #681503275
gitlab-org-docker
containerize

00:07:18

manual #681503277
internal allowed to fail manual
deploy_beta_staging
 
  Security
passed #681503283
gitlab-org
container_scanning

00:01:08

passed #681503280
gitlab-org
dast

00:06:32

passed #681503282
gitlab-org-docker
dependency_scanning

00:07:36

passed #681503279
gitlab-org-docker
sast

00:03:05

passed #681503284
gitlab-org-docker
secret_detection

00:00:26