fix(ui): upgrade bundled jQuery to 3.7.1 for CVE compliance

[renecannao]

Summary

• Upgrades bundled resources/public/js/jquery.min.js from 1.11.3 → 3.7.1 (meets ≥ 3.5.0 scanner / customer requirement)
• Upgrades jquery-ui.min.js from 1.11.4 → 1.13.3 so cluster drag/drop keeps working on jQuery 3.x
• Adds TestBundledJQueryMeetsSecurityFloor so CI fails if jQuery regresses below 3.5.0

This is a focused CVE/security response for customers scanning UI static assets. Broader frontend modernization remains in #103.

Context

Customer report: Percona/ProxySQL packages still ship jQuery 1.11.3; fixed version required is ≥ 3.5.0. Confirmed on current master before this change.

Test plan

• go test ./go/http/ -run 'TestBundledJQueryMeetsSecurityFloor|TestRenderHTMLYield' -v
• Manual smoke: open /web/clusters, /web/cluster/<name> (drag/drop), cookie toggles (auto-refresh / anonymize)
• Confirm jquery.min.js response header/banner shows jQuery v3.7.1

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: fed22022-561b-4907-9e1c-016b8ae115a4

📥 Commits

Reviewing files that changed from the base of the PR and between 0b79ec0 and 685a4a3.

⛔ Files ignored due to path filters (2)

• resources/public/js/jquery-ui.min.js is excluded by !**/*.min.js
• resources/public/js/jquery.min.js is excluded by !**/*.min.js

📒 Files selected for processing (1)

• go/http/static_assets_test.go

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/upgrade-jquery-3.7

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