fix: ensure goenv is always loaded so GOPATH is correctly set

The lazy-loading could lead to incorrect GOPATH values in sub-shells and
tmux instances which inherited a old GOPATH value from the parent
shell.

This is mostly an issue when new Go versions are installed, but it's
still an issue. Hence I now always load goenv in the background ensuring
it sets GOPATH correctly regardless of any existing GOPATH value.

zsh/golang.zsh

@@ -8,31 +8,14 @@
 
 # install goenv
 zinit ice wait lucid as'program' pick'bin/goenv' from'gh' \
-  atclone'src/configure && make -C src' atpull'%atclone' nocompile'!'
+  atclone'src/configure && make -C src; ../libexec/goenv init - > zgoenv.zsh' \
+  atpull'%atclone' src'zgoenv.zsh' nocompile'!'
 zinit light syndbg/goenv
 
 zinit ice wait lucid as'program' pick'plugins/go-build/bin/go-build' from'gh' \
   id-as'syndbg/go-build'
 zinit light syndbg/goenv
 
-# lazy-load goenv
-goenv() {
-  load-goenv
-  goenv "$@"
-}
-
-_goenv() {
-  load-goenv
-  _goenv "$@"
-}
-
-compctl -K _goenv goenv
-
-load-goenv() {
-  unset -f load-goenv _goenv goenv
-  eval "$(command goenv init -)"
-}
-
 # ==============================================================================
 # global golang packages
 # ==============================================================================