Add missing .PHONY target

[marckhouzam]

What this PR does / why we need it

Add a .PHONY make target for plugin-build-local to avoid risk of make plugin-build-local causing plugin-build-% to be tirggered.

Which issue(s) this PR fixes

Fixes #527

Describe testing done for PR

Before this PR.
First remove the extra TAB in plugin-tooling.mk

$ PLUGIN_NAME=builder make plugin-build-local
/Users/kmarc/git/tanzu-cli/bin/builder plugin build \
		--path ./cmd/plugin \
		--binary-artifacts /Users/kmarc/git/tanzu-cli/artifacts/plugins \
		--version v1.1.0-dev \
		--ldflags "-X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.Date=2023-10-08' -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.SHA=faae59672-dirty' -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.Version=v1.1.0-dev'" \
		--goflags "" \
		--os-arch darwin_arm64 \
		--match "builder" \
		--plugin-scope-association-file ./cmd/plugin/plugin-scope-association.yaml
2023-10-08T15:59:16-04:00 [i] building local repository at /Users/kmarc/git/tanzu-cli/artifacts/plugins, v1.1.0-dev, [darwin_arm64]
2023-10-08T15:59:16-04:00 [i] 🐭 - building plugin at path "cmd/plugin/builder"
2023-10-08T15:59:18-04:00 [i] 🐭 - $ /Users/kmarc/.asdf/shims/go build -o /Users/kmarc/git/tanzu-cli/artifacts/plugins/darwin/arm64/global/builder/v1.1.0-dev/tanzu-builder-darwin_arm64 -ldflags -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.Date=2023-10-08' -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.SHA=faae59672-dirty' -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.Version=v1.1.0-dev' -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.Version=v1.1.0-dev' -tags  ./cmd/plugin/builder
2023-10-08T15:59:19-04:00 [i] ========
2023-10-08T15:59:19-04:00 [i] saving plugin manifest...
2023-10-08T15:59:19-04:00 [i] saving plugin group manifest...
2023-10-08T15:59:19-04:00 [ok] successfully built local repository
/Users/kmarc/git/tanzu-cli/bin/builder plugin build \
		--path ./cmd/plugin \
		--binary-artifacts /Users/kmarc/git/tanzu-cli/artifacts/plugins \
		--version v1.1.0-dev \
		--ldflags "-X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.Date=2023-10-08' -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.SHA=faae59672-dirty' -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.Version=v1.1.0-dev'" \
		--goflags "" \
		--os-arch local_ \
		--match "builder" \
		--plugin-scope-association-file ./cmd/plugin/plugin-scope-association.yaml
2023-10-08T15:59:19-04:00 [i] building local repository at /Users/kmarc/git/tanzu-cli/artifacts/plugins, v1.1.0-dev, [local_]
2023-10-08T15:59:19-04:00 [i] 🐮 - building plugin at path "cmd/plugin/builder"
2023-10-08T15:59:21-04:00 [x] "local_" build architecture is not supported
2023-10-08T15:59:21-04:00 [i] ========
2023-10-08T15:59:21-04:00 [i] saving plugin manifest...
Error: open /Users/kmarc/git/tanzu-cli/artifacts/plugins/local/plugin_manifest.yaml: no such file or directory
2023-10-08T15:59:21-04:00 [x] : open /Users/kmarc/git/tanzu-cli/artifacts/plugins/local/plugin_manifest.yaml: no such file or directory
make: *** [plugin-build-local] Error 1

Notice the extra attempt at building using the invalid local_ os-arch.

With this PR (which also removes the extra TAB)

$ PLUGIN_NAME=builder make plugin-build-local
/Users/kmarc/git/tanzu-cli/bin/builder plugin build \
		--path ./cmd/plugin \
		--binary-artifacts /Users/kmarc/git/tanzu-cli/artifacts/plugins \
		--version v1.1.0-dev \
		--ldflags "-X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.Date=2023-10-08' -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.SHA=faae59672-dirty' -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.Version=v1.1.0-dev'" \
		--goflags "" \
		--os-arch darwin_arm64 \
		--match "builder" \
		--plugin-scope-association-file ./cmd/plugin/plugin-scope-association.yaml
2023-10-08T15:59:51-04:00 [i] building local repository at /Users/kmarc/git/tanzu-cli/artifacts/plugins, v1.1.0-dev, [darwin_arm64]
2023-10-08T15:59:51-04:00 [i] 🐼 - building plugin at path "cmd/plugin/builder"
2023-10-08T15:59:53-04:00 [i] 🐼 - $ /Users/kmarc/.asdf/shims/go build -o /Users/kmarc/git/tanzu-cli/artifacts/plugins/darwin/arm64/global/builder/v1.1.0-dev/tanzu-builder-darwin_arm64 -ldflags -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.Date=2023-10-08' -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.SHA=faae59672-dirty' -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.Version=v1.1.0-dev' -X 'github.com/vmware-tanzu/tanzu-plugin-runtime/plugin/buildinfo.Version=v1.1.0-dev' -tags  ./cmd/plugin/builder
2023-10-08T15:59:54-04:00 [i] ========
2023-10-08T15:59:54-04:00 [i] saving plugin manifest...
2023-10-08T15:59:54-04:00 [i] saving plugin group manifest...
2023-10-08T15:59:54-04:00 [ok] successfully built local repository

Only the single local build is performed as expected.

Release note

Fix missing target in `plugin-tooling.mk` file

Additional information

Special notes for your reviewer

[vuil]

lgtm