fix(makefile): install goimports to $(LOCALBIN)

[rriski]

If goimports wasn't installed, make build would fail with:

❯ make build
go generate ./...
2023/12/18 11:45:04 can't compile field "topic_name" regex `^(?!\.$|\.\.$)[-_.A-Za-z0-9]+$`: error parsing regexp: invalid or unsupported Perl syntax: `(?!`
2023/12/18 11:45:04 can't compile field "name" regex `^(?!\.$|\.\.$)[-_.A-Za-z0-9]+$`: error parsing regexp: invalid or unsupported Perl syntax: `(?!`
2023/12/18 11:45:04 can't compile field "tag" regex `^(?!aiven-)[^\W\d_](?:[:\w./-]*[\w./-])?$`: error parsing regexp: invalid or unsupported Perl syntax: `(?!`
2023/12/18 11:45:04 can't compile field "kafka_topic" regex `^(?!\.$|\.\.$)[-_.A-Za-z0-9]+$`: error parsing regexp: invalid or unsupported Perl syntax: `(?!`
test -s /Users/riski/code/work/aiven-operator/bin/controller-gen || GOBIN=/Users/riski/code/work/aiven-operator/bin go install sigs.k8s.io/controller-tools/cmd/[email protected]
/Users/riski/code/work/aiven-operator/bin/controller-gen object:headerFile="hack/boilerplate.go.txt" paths="./..."
find . -type f -name '*.go' -exec sed -zi 's/"\n\+\t"/"\n"/g' {} +
goimports -local "github.com/aiven/aiven-operator" -w .
bash: line 1: goimports: command not found
make: *** [Makefile:352: imports] Error 127

This commit adds a new target to the makefile which downloads goimports to $(LOCALBIN) if necessary.

[ivan-savciuc]

LGTM, @Serpentiel please check it out

[Serpentiel]

lgtm