modify env var passed to ggshield to get number of commits in push event

Author: amascia-gg

src/@orb.yml

@@ -25,13 +25,18 @@ examples:
           jobs:
             - ggshield/scan:
                 name: ggshield-scan  # best practice is to name each orb job
-                base_revision: <<pipeline.git.base_revision>>
-                revision: <<pipeline.git.revision>>
-
+                number_commits_github: <<pipeline.trigger_parameters.github_app.total_commits_count>>
+                number_commits_gitlab: <<pipeline.trigger_parameters.gitlab.total_commits_count>>
 
 jobs:
   scan:
     parameters:
+      number_commits_github:
+        description: number of commits in the GitHub event.
+        type: string
+      number_commits_gitlab:
+        description: number of commits in the GitLab event.
+        type: string
       base_revision:
         description: |
           ID of the first commit to scan. Leave empty to only scan the latest
@@ -50,7 +55,8 @@ jobs:
     docker:
       - image: gitguardian/ggshield:<<parameters.tag>>
     environment:
-      CIRCLE_RANGE: <<parameters.base_revision>>...<<parameters.revision>>
+      NUMBER_COMMITS_GITHUB: <<parameters.number_commits_github>>
+      NUMBER_COMMITS_GITLAB: <<parameters.number_commits_gitlab>>
     steps:
       - checkout
       - run: ggshield secret scan -v ci