Introduce spaces field mask

[butonic]

We now use a field mask to select which properties to retrieve when looking up storage spaces. This allows the gateway to only ask for root when trying to forward id or path based requests. It allows the spaces storage registry to omit calling ListStorageSpaces on the storage provider.

Related: #2881

[butonic]

there are problems in the ocis test suite I need to check before continuing: https://drone.owncloud.com/owncloud/ocis/12029/37/7

[butonic]

still a problem: https://drone.owncloud.com/owncloud/ocis/12070/46/6

  @skipOnOcV10.6 @skipOnOcV10.7 @skipOnOcV10.8.0
  Scenario Outline: as share receiver copying a file inside a folder changes its etag for all collaborators      # /srv/app/testrunner/tests/acceptance/features/apiWebdavEtagPropagation2/copyFileFolder.feature:153
    Given user "Brian" has been created with default attributes and without skeleton files                       # FeatureContext::userHasBeenCreatedWithDefaultAttributesAndWithoutSkeletonFiles()
    And the administrator has set the default folder for received shares to "Shares"                             # OccContext::theAdministratorHasSetTheDefaultFolderForReceivedSharesTo()
    And parameter "shareapi_auto_accept_share" of app "core" has been set to "no"                                # AppConfigurationContext::serverParameterHasBeenSetTo()
    And using <dav_version> DAV path                                                                             # FeatureContext::usingOldOrNewDavPath()
    And user "Alice" has created folder "/upload"                                                                # FeatureContext::userHasCreatedFolder()
    And user "Alice" has uploaded file with content "uploaded content" to "/upload/file.txt"                     # FeatureContext::userHasUploadedAFileWithContentTo()
    And user "Alice" has shared folder "/upload" with user "Brian"                                               # FeatureContext::userHasSharedFileWithUserUsingTheSharingApi()
    And user "Brian" has accepted share "/upload" offered by user "Alice"                                        # FeatureContext::userHasReactedToShareOfferedBy()
    And user "Alice" has stored etag of element "/"                                                              # WebDavPropertiesContext::userHasStoredEtagOfElement()
    And user "Alice" has stored etag of element "/upload"                                                        # WebDavPropertiesContext::userHasStoredEtagOfElement()
    And user "Alice" has stored etag of element "/upload/file.txt"                                               # WebDavPropertiesContext::userHasStoredEtagOfElement()
    And user "Alice" has stored etag of element "/upload/file.txt" on path "/upload/renamed.txt"                 # WebDavPropertiesContext::userStoresEtagOfElementOnPath()
    And user "Brian" has stored etag of element "/"                                                              # WebDavPropertiesContext::userHasStoredEtagOfElement()
    And user "Brian" has stored etag of element "/Shares"                                                        # WebDavPropertiesContext::userHasStoredEtagOfElement()
    And user "Brian" has stored etag of element "/Shares/upload"                                                 # WebDavPropertiesContext::userHasStoredEtagOfElement()
    And user "Brian" has stored etag of element "/Shares/upload/file.txt"                                        # WebDavPropertiesContext::userHasStoredEtagOfElement()
    And user "Brian" has stored etag of element "/Shares/upload/file.txt" on path "/Shares/upload/renamed.txt"   # WebDavPropertiesContext::userStoresEtagOfElementOnPath()
    When user "Brian" copies file "/Shares/upload/file.txt" to "/Shares/upload/renamed.txt" using the WebDAV API # FeatureContext::userCopiesFileUsingTheAPI()
    Then the HTTP status code should be "201"                                                                    # FeatureContext::thenTheHTTPStatusCodeShouldBe()
    And these etags should have changed:                                                                         # WebDavPropertiesContext::theseEtagsShouldHaveChanged()
      | user  | path                       |
      | Alice | /                          |
      | Alice | /upload                    |
      | Alice | /upload/renamed.txt        |
      | Brian | /                          |
      | Brian | /Shares                    |
      | Brian | /Shares/upload             |
      | Brian | /Shares/upload/renamed.txt |
    And these etags should not have changed:                                                                     # WebDavPropertiesContext::theseEtagsShouldNotHaveChanged()
      | user  | path                    |
      | Alice | /upload/file.txt        |
      | Brian | /Shares/upload/file.txt |

    Examples:
      | dav_version |
      | old         |
      | new         |
        WebDavPropertiesContext::theseEtagsShouldHaveChanged
        The etag '"becf8ed1ae946201f65580f89b745936"' of element '/upload' of user 'Alice' did not change.
        Failed asserting that 1 matches expected 0.
      | spaces      |
        Expected stored etag to be some string but found null! (Exception)

runsh: Total unexpected failed scenarios throughout the test run:
apiWebdavEtagPropagation2/copyFileFolder.feature:189

[sonarcloud]

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