This fixes:
--------------------------------------------------------------------------------
configuring
ERROR at //ui/gtk/BUILD.gn:17:1: Assertion failed.
assert(use_gio, "GIO is required for building with GTK")
^-----
GIO is required for building with GTK
See //content/shell/BUILD.gn:308:15: which caused the file to be included.
deps += [ "//ui/gtk" ]
^---------
--------------------------------------------------------------------------------
But there's still another build issue(s) left:
--------------------------------------------------------------------------------
[25491/48383] ACTION //components/url_formatter/spoof_checks/top_domains:generate_top_domain_list_variables_file(//build/toolchain/linux/unbundle:default)d_tmp/browser_command.mojom-webui.jsab_page_third_party.mojom-webui.js
FAILED: gen/components/url_formatter/spoof_checks/top_domains/top500-domains-inc.cc
python3 ../../build/gn_run_binary.py make_top_domain_list_variables ../../components/url_formatter/spoof_checks/top_domains/domains.list top500_domains gen/components/url_formatter/spoof_checks/top_domains/top500-domains-inc.cc
make_top_domain_list_variables failed with exit code -4
ninja: build stopped: subcommand failed.
--------------------------------------------------------------------------------
Now that the terraform 0.12 compatibility is not needed anymore, the
`terraform.withPlugins` and `terraform-providers.mkProvider`
implementations can be simplified.
Instead of building a bunch of bin wrappers on instantiation, the
providers are now stored in
`$out/libexec/terraform-providers/<registry>/<owner>/<name>/<version>/<os>_<arch>/terraform-provider-<name>_v<version>`
and then a simple `buildEnv` can be used to merge them.
This breaks back-compat so it's not possible to mix-and-match with
previous versions of nixpkgs. In exchange, it now becomes possible to
use the providers from
[nixpkgs-terraform-providers-bin](https://github.com/numtide/nixpkgs-terraform-providers-bin)
directly.
