chore(test): remove legacy API test suite and related infrastructure

[kriszyp]

Summary

• Removes the legacy integrationTests/apiTests/tests/ directory (29 test files + testSuite.mjs) — all content has been ported to self-contained *.test.mjs files now living alongside the data/utils dirs
• Removes legacy shared utilities (utils/request.mjs, restart.mjs, schema.mjs, etc.) and the OCSP/CRL security utilities (used only by unported TLS tests)
• Removes config/envConfig.mjs and .env.example (new tests get credentials from ctx.harper.admin, not env vars)
• Removes package.json script test:integration:api-tests
• Removes three "Integration API Tests" CI jobs from integration-tests.yml (Node.js matrix, Bun disabled-job, Windows) — coverage now fully provided by the sharded Integration Tests jobs that glob all *.test.mjs files

⚠️ Depends on: PRs #761 (delete tests) and #778 (northwind tests) — merge those first to avoid the new test files conflicting.

TLS tests (24_ocspVerification, 26_crlVerification) were not in testSuite.mjs and required special mTLS/OpenSSL infrastructure; they are deferred for a future migration PR.

Test plan

• Verify test(integration): port delete operations tests to self-contained framework #761 and test(integration): port Northwind test suite to self-contained framework #778 are merged before merging this PR
• CI: Integration Tests shards 1–4 should continue passing on all platforms (no regressions)
• CI: "Integration API Tests" jobs should no longer appear in the checks list

🤖 Generated with Claude Code

[gemini-code-assist]

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[claude]

1. Prerequisite PRs are still open — coverage would silently drop if merged now

File: integrationTests/apiTests/tests/testSuite.mjs (deleted)
What: PRs #761 (delete-ops port) and #778 (Northwind/SQL port) are both still OPEN. This PR removes the only test runner for 3_sqlTests, 4_noSqlTests, 5_noSqlRoleTesting, 6_sqlRoleTesting, 7_jobsAndJobRoleTesting, 8_deleteTests, 8a_restartHdbToUpdateConfig, and 10_otherRoleTests. None of those have a *.test.mjs replacement in the current HEAD.
Why it matters: CI will not fail — the old test script is gone and the replacement tests don't exist yet. SQL queries, NoSQL CRUD, role-based data access, and delete operations would stop being exercised by CI without any alert.
Suggested fix: Merge #761 and #778 first (per the test plan in the PR body), then merge this PR. The test plan already says this; the blocker is that the prerequisites are not yet merged.

[kriszyp]

Acknowledged — this is already documented in the PR description as a hard prerequisite ("⚠️ Depends on: PRs #761 and #778 — merge those first"). Converting to draft to make the ordering explicit and prevent accidental early merge.

— Claude

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