Revert "gocode: remove"

[katexochen]

Reverts #276887

I've missed two references when removing this, and fixing causes a mass rebuild, so reverting on master and reopening on staging so that the packages don't stay broken during the staging cycle.

[raphaelr]

I don't understand why this is causing so many rebuilds. Picking one of them (vimPlugins.vim-ps1) at random - the .drv path is exactly the same:

$ git checkout master
$ git rev-parse HEAD
c931d73fba96e8efc7378c6a24ccb25f4440c9e3
$ nix-instantiate -A vimPlugins.vim-ps1
/nix/store/1znp2a3ghgx3jam3ypnqn7bmag77bxjp-vimplugin-vim-ps1-2023-12-09.drv
$ git fetch upstream pull/279324/head
$ git merge FETCH_HEAD
Auto-merging pkgs/top-level/aliases.nix
Auto-merging pkgs/top-level/all-packages.nix
Merge made by the 'ort' strategy.
 pkgs/development/tools/gocode/default.nix | 43 ++++++++++++++++++++++++++++++++++++++++
 pkgs/development/tools/gocode/deps.nix    | 12 ++++++++++++
 pkgs/top-level/aliases.nix                | 62 ++++++++++++++++++++++++----------------------------------
 pkgs/top-level/all-packages.nix           |  2 ++
 4 files changed, 83 insertions(+), 36 deletions(-)
 create mode 100644 pkgs/development/tools/gocode/default.nix
 create mode 100644 pkgs/development/tools/gocode/deps.nix
$ nix-instantiate -A vimPlugins.vim-ps1
/nix/store/1znp2a3ghgx3jam3ypnqn7bmag77bxjp-vimplugin-vim-ps1-2023-12-09.drv

[fabianhjr]

probably detected as adding those expressions and on removal those weren't counted.

[fabianhjr]

Inclined to merge as is