fix(go): modify the `build` callback to avoid freezing on `go.nvim` installation

[rami3l]

📑 Description

Currently, Neovim will freeze when installing/updating go.nvim due to the synchronous callback trying to install relevant Golang CLI devtools. This PR stops that from happening via an asynchronous callback instead.

cc https://github.com/ray-x/go.nvim/issues/433

ℹ Additional Information

I have locally tested this change on my machine using the following override:

  -- astrocommunity.pack.go
  {
    "ray-x/go.nvim",
    build = function() require("go.install").update_all() end,
  },

[github-actions[bot]]

Review Checklist

Does this PR follow the [Contribution Guidelines](development guidelines)? Following is a partial checklist:

Proper conventional commit scoping:

• If you are adding a new plugin, the scope would be the name of the category it is being added into. ex. feat(utility): added noice.nvim plugin

• If you are modifying a pre-existing plugin or pack, the scope would be the name of the plugin folder. ex. fix(noice-nvim): fix LSP handler error

• [x] Pull request title has the appropriate conventional commit type and scope where the scope is the name of the pre-existing directory in the project as described above

• [x] README is properly formatted and uses fenced in links with <url> unless they are inside a [title](url)

• [x] Proper usage of opts table rather than setting things up with the config function.