Update gitlab to 12.5.4

Backport required

• ruby-default-value-for (>= 3.3~) - @praveen
• ruby-omniauth-openid-connect (>= 0.3.3~) - @praveen need ruby-omniauth 1.9.0-1 to clear backports-new first
• ruby-task-list (>= 2.2.1~) - @praveen
• ruby-nokogiri (>= 1.10.5~) - @praveen
• ruby-state-machines-activerecord (>= 0.6~) - @gi-boi
• ruby-kubeclient (>= 4.4~) - @gi-boi
• ruby-rack-attack (>= 6.2~) - @praveen
• ruby-gitaly (>= 1.70+dfsg~)
• ruby-flipper (>= 0.17.1~) - @gi-boi
• ruby-retriable (>= 3.1.2~) - @praveen wait for testing migration
• gitaly (>= 1.72.1+dfsg-2~)

Unpackaged gems

• gitlab-peek | ~> 0.0.1 - embedded, consider updating ruby-peek
• gitlab-license | ~> 1.0 - EE only, removed from Gemfile with patch
• diff_match_patch | ~> 0.1.0
• gitlab_chronic_duration | ~> 0.10.6.1 - ruby-chronic-duration updated, add exception in gemdeps generator
• gitlab-net-dns | ~> 0.9.1 - update ruby-net-dns - @praveen
• elasticsearch-rails | ~> 0.1.9 - embedded, ask upstream to update to a recent version.
• derailed_benchmarks | - embedded, but need packaging
• faraday_middleware-aws-signers-v4 | - embedded, waiting for upstream to switch to a maintained alternative

Patch updates

• omniauth_openid_connect | ~> 0.3.3 | 0.3.1 - @praveen
• deckar01-task_list | 2.2.1 | 2.2.0

Minor updates (Stable)

• bootsnap | ~> 1.4 | 1.3.0 - stuck with test failures
• kubeclient | ~> 4.4.0 | 4.3.0 - @praveen
• gitaly | ~> 1.70.0 | 1.37.0+dfsg - @praveen
• default_value_for | ~> 3.3.0 | 3.2.0 - @praveen

Minor updates (Development)

• flipper-active_record | ~> 0.17.1 | 0.13.0 - @praveen
• state_machines-activerecord | ~> 0.6.0 | 0.5.1 -@praveen
• flipper | ~> 0.17.1 | 0.13.0 @praveen
• flipper-active_support_cache_store | ~> 0.17.1 | 0.13.0 - @praveen

Major updates

• responders | ~> 3.0 | 2.4.0 - @samyak-jn
• rack-attack | ~> 6.2.0 | 4.4.1 - @praveen
• elasticsearch-api | 5.0.3 | 1.0.12 - updated in experimental

Already Newer

• rubyzip | ~> 1.3.0 | 2.0.0 - @utkarsh2102
• rouge | ~> 3.11.0 | 3.14.0
• asciidoctor-plantuml | 0.0.9 | 0.0.10 - @praveen https://gitlab.com/gitlab-org/gitlab/merge_requests/22205
• diffy | ~> 3.1.0 | 3.2.1
• kaminari-core | = 1.0.0 | 1.0.1
• i18n_data | ~> 0.8.0 | 0.10.0
• elasticsearch-transport | = 0.4.0 | 1.0.12
• railties | <= 5.1.0, >= 4 | 5.2.3+dfsg
• googleauth | ~> 0.5.1 | 0.8.0
• character_set | ~> 1.0.0 | 1.1.2
• mail | ~> 2.2.5 | 2.7.1+dfsg1
• rack-test | ~> 0.5.4 | 0.7.0
• safe_yaml | ~> 0.9.0 | 1.0.5
• google-api-client | ~> 0.23.0 | 0.28.4
• elasticsearch-model | ~> 0.1.9 | 7.0.0
• contracts | <= 0.11, ~> 0.7 | 0.16.0
• kaminari-activerecord | = 1.0.0 | 1.0.1
• omniauth_crowd | ~> 2.2.0 | 2.4.0
• activesupport | = 3.0.0 | 5.2.3+dfsg
• public_suffix | >= 2.0.2, ~> 2.0 | 3.0.3+ds
• builder | ~> 2.1.2 | 3.2.3
• kaminari-actionview | = 1.0.0 | 1.0.1
• actionpack | = 3.0.0 | 5.2.3+dfsg
• axiom-types | ~> 0.0.5 | 0.1.1
• coercible | ~> 0.2 | 1.0.0
• hamlit | ~> 2.8.8 | 2.9.2
• uber | ~> 0.0.15 | 0.1.0