Fix incremental installation when dependent pod resources change

[jszumski]

Fixes #11567: for projects using incremental_installation: true, consuming pods were not updated when their dependencies add/rename/remove resource_bundles. When SomePodWithResources updates a resource bundle in its podspec, there should be a corresponding update to ConsumingPod in the ConsumingPod-resources.sh build script:

if [[ "$CONFIGURATION" == "Debug" ]]; then
  install_resource "${PODS_CONFIGURATION_BUILD_DIR}/SamplePodWithResources/SomeBundleName.bundle"
fi
if [[ "$CONFIGURATION" == "Release" ]]; then
  install_resource "${PODS_CONFIGURATION_BUILD_DIR}/SamplePodWithResources/SomeBundleName.bundle"
fi

---

Notable changes:

• The cache calculation now receives a copy of the pod list so it can examine dependent pod attributes. This caused a lot of diff noise because each call site changed.
• The cache key dictionary now lists RESOURCES for dependencies (if applicable). This ensures the {name}-resource.sh script is regenerated when dependencies change bundled resources.

[jszumski]

I'm open to changing this key since its not immediately obvious how FILES and RESOURCES are different.

[CocoaPodsBarista]

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* Fix incremental installation when dependent pod resources change  
  [jszumski](https://github.com/jszumski)
  [#issue_number](https://github.com/CocoaPods/CocoaPods/issues/issue_number)

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