AC-18494::Developer document updates for Zend and Symfony cache

[djadobe16]

Purpose

Adds documentation for running integration tests against different cache backends. This guide explains how developers can configure and test with Redis, Valkey, Symfony Cache, and two-level (L1/L2) cache variants.

Changes

Updated src/pages/guide/integration/index.md:

• Added new section "Run the integration tests against a specific cache backend"
• Documents all supported cache backend options with descriptions
• Provides configuration example for install-config-mysql.php
• Clarifies connection parameters for each backend type

Affected Pages

• https://developer.adobe.com/commerce/php/development/components/cache/

Affected pages

• https://developer.adobe.com/commerce/testing/guide/integration/

whatsnew

Added documentation for configuring integration tests to run against specific cache backends, including Redis, Valkey, Symfony Cache, and two-level cache options. See Run the integration tests against a specific cache backend

[github-actions]

🔍 Linter Report

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                     LINTER REPORT
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Generated: 2026-09-30T15:22:21.568Z
Mode: Full Linting (all rules + dead links check)
Target Directory: /home/runner/work/commerce-testing/commerce-testing

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Files to process: 1


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                        SUMMARY
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  📁 Files processed:    1
  📄 Files with issues:  0
  ❌ Total errors:       0
  ⚠️  Total warnings:     0
  📋 Total issues:       0

Result: ✅ PASSED - All files passed linting successfully!

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