Fix triage and remediation profile defaults

What does this MR do and why?

Corrects the Triage and Remediation :icecream presets so their values match the updated product definition.

The presets (Conservative, Standard, Proactive) already exist on master, but the table that defines them was revised after they were merged:

Correction	Detail
SAST VR merge request limit	New open_merge_requests_limit on the SAST vulnerability resolution JSON schema. Preset values 5 / 15 / null, where null means no limit.
Vulnerability enrichment severity	New severity_level on the vulnerability enrichment JSON schema. Preset values high / medium / info. The three presets previously carried identical configuration for this trigger.
Dependency baseline realigned	Standard's sbom_ingested now references DependencyScanningPostProcessing::VALUES directly rather than restating it, so the Triage and Remediation baseline cannot drift from the existing dependency defaults again. Restores severity high and runner_tags.

Changelog: fixed
EE: true

Related issue

[Backend] Add Conservative / Standard / Proacti... (#622469 - closed) • Gal Katz • 19.4

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