update actions v3->v4 #243

	name: Tests

	on:
	pull_request:
	branches:
	- main
	push:
	branches:
	- main

	jobs:
	go-test:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-go@v4
	with: { go-version: 1.x }

	- run: make check
	- run: make check-cli-docs

	kuttl-test:
	runs-on: ubuntu-latest
	needs: [go-test]
	strategy:
	fail-fast: false
	matrix:
	kubernetes: [v1.27, v1.26, v1.25, v1.24, v1.23, v1.22, v1.21]
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-go@v4
	with: { go-version: 1.x }

	- name: Start k3s
	uses: ./.github/actions/k3d
	with:
	k3s-channel: "${{ matrix.kubernetes }}"

	- name: Build CLI
	run: make build

	- name: Create operator namespace
	run: kubectl create namespace postgres-operator

	- name: Install Operator
	run: helm install pgo oci://registry.developers.crunchydata.com/crunchydata/pgo -n postgres-operator

	- name: Use bash, so we can use double square-bracket [[ syntax in our scripts
	run: \|
	sudo ln -s bash /bin/sh.bash
	sudo mv /bin/sh.bash /bin/sh

	- name: Install kuttl
	run: \|
	curl -Lo /usr/local/bin/kubectl-kuttl https://github.com/kudobuilder/kuttl/releases/download/v0.15.0/kubectl-kuttl_0.15.0_linux_x86_64
	chmod +x /usr/local/bin/kubectl-kuttl

	- name: Run kuttl
	run: \|
	make check-kuttl

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