ci(FB-4867): ignore major bumps of integration-testing-setup in dependabot

[fstr]

firebolt-db/integration-testing-setup uses its major version to select the product: v1 sets up FB 1.0 and v2 sets up FB 2.0. Dependabot treats v1 → v2 as an upgrade and bundles it into the grouped actions PR. That would silently move FB 1.0 integration tests to FB 2.0.

This adds an ignore rule for major updates of that action. Minor and patch updates within each major version still come through.

The existing config already has a 7-day cooldown and grouped updates, so nothing else changes.

Ticket: FB-4867

🤖 Generated with Claude Code

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Note

Low Risk
Dependabot-only change with no runtime code impact; it reduces risk of accidental major action bumps in CI.

Overview
Adds a Dependabot ignore rule on the github-actions ecosystem so major version bumps of firebolt-db/integration-testing-setup are not proposed. Major versions pick the Firebolt product line (v1 vs v2), not a safe semver upgrade; without this, grouped action updates could move FB 1.0 integration tests onto FB 2.0.

Minor and patch updates for that action are unchanged and still flow through the existing schedule, cooldown, and grouping.

^{Reviewed by Cursor Bugbot for commit e6aedc4. Bugbot is set up for automated code reviews on this repo. Configure here.}

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud