[stable22] Cache images on browser

[backportbot-nextcloud]

backport of #27835

[MichaIng]

Failed test doesn't seem related:

--- Failed scenarios:

    /drone/src/tests/acceptance/features/app-files-sharing-link.feature:14

  Scenario: hide download in a public shared link                   # /drone/src/tests/acceptance/features/app-files-sharing-link.feature:14
    Given I act as John                                             # ActorContext::iActAs()
    And I am logged in                                              # LoginPageContext::iAmLoggedIn()
    And I share the link for "welcome.txt"                          # FilesAppSharingContext::iShareTheLinkFor()
    And I set the download of the shared link as hidden             # FilesAppSharingContext::iSetTheDownloadOfTheSharedLinkAsHidden()
      Share link menu in the details view in Files app could not be found after 100 seconds
      Hide download checkbox input in the details view in Files app could not be found after 100 seconds (NoSuchElementException)
    And I write down the shared link                                # FilesAppSharingContext::iWriteDownTheSharedLink()
    When I act as Jane                                              # ActorContext::iActAs()
    And I visit the shared link I wrote down                        # PublicShareContext::iVisitTheSharedLinkIWroteDown()
    And I see that the current page is the shared link I wrote down # PublicShareContext::iSeeThatTheCurrentPageIsTheSharedLinkIWroteDown()
    Then I see that the download button is not shown                # PublicShareContext::iSeeThatTheDownloadButtonIsNotShown()
    And I see that the Share menu button is not shown               # PublicShareContext::iSeeThatTheShareMenuButtonIsNotShown()