Chore: Update deprecated static_analysis product group

Homer Silvarequested to merge
chore/update-static-analysis-product-group into master

What does this MR do and why?

Update events, metrics from static_analysis to code_scanning .

Remove deprecated product group from product_groups.json file

References

Current product groups: https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/data/stages.yml

Events and metrics with invalid product groups trigger an alert here: https://gitlab.enterprise.slack.com/archives/C072281EM5E/p1784534630826409

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