Fix script definition in processorcontainer

[l-trotta]

Fixes Issue 500
ProcessorContainer class was referring to Script instead of ScriptProcessor

[github-actions]

Following you can find the validation results for the APIs you have changed.

API	Status	Request	Response
ingest.delete_pipeline	🟢	11/11	11/11
ingest.geo_ip_stats	⚪	Missing test	Missing test
ingest.get_pipeline	🔴	22/22	6/22
ingest.processor_grok	🟢	1/1	1/1
ingest.put_pipeline	🔴	33/42	40/42
ingest.simulate	🔴	0/7	6/7

You can validate these APIs yourself by using the make validate target.

[swallez]

LGTM, good catch!

[github-actions]

The backport to 7.17 failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-7.17 7.17
# Navigate to the new working tree
cd .worktrees/backport-7.17
# Create a new branch
git switch --create backport-2400-to-7.17
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 891d3cff9022b9726209cb7dcfd116c48b5669f6
# Push it to GitHub
git push --set-upstream origin backport-2400-to-7.17
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-7.17

Then, create a pull request where the base branch is 7.17 and the compare/head branch is backport-2400-to-7.17.