fix: add missing operation names to path validator

[tomblench]

PR summary

add missing operation names to path validator

Note: An existing issue is required before opening a PR.

PR Checklist

Please make sure that your PR fulfills the following requirements:

• [x] The commit message follows the Angular Commit Message Guidelines.
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

PR Type

• [x] Bugfix
• [ ] Feature
• [ ] Code style update (formatting, local variables)
• [ ] Refactoring (no functional changes, no api changes)
• [x] New tests
• [ ] Build/CI related changes
• [ ] Documentation content changes
• [ ] Other (please describe)

What is the current behavior?

Not all operations have paths validated

What is the new behavior?

Validate paths additionally on

getDocumentAsMixed getDocumentAsRelated getDocumentAsStream

Does this PR introduce a breaking change?

• [x] Yes - only if previous users relied on previous behaviour
• [ ] No

migration path: any applications which use special paths for the above operations should use the correct operation, eg one of the *AllDocs* methods in the case of the _all_docs path.

Other information