chore(docs): update to dgeni-0.4.0

* update package with new services and computeId config
* generateIndexPagesProcessor was not using log
* use StringMap not ES6-shim Map in errorNamespaceMap
* remove unused dependencies from generateErrorDocsProcessor
* ensure generatePagesDataProcessor adds its doc to the collection
* debugDumpProcessor was moved to dgeni-packages
test(docs): improve docs e2e tests
test(docs): add extra docs e2e tests
docs(ngShowHide): use backticks to denote CSS classes and directive names

add backticks around directive names to improve documentation consistency, as it's used in some
parts of the docs already.

Closes #9081
chore(docs): ensure all docs e2e tests are run
test(docs): fix url matching on api e2e tests
chore(docs): remove excess indentation from code blocks

dgeni-packages 0.10.0-rc.5 has a fix for this problem, so this commit updates
to that version.
Adds a new e2e test to prove this is fixed.

Closes #8963
docs(ngView): remove obsolete comment from code sample

Closes #9086