feat: support env vars in OCI secrets (#88)

## Description
Allow users to specify basic auth credentials _OR_ arbitrary environment
variables when configuring OCI registry secrets.

Other
- Add automation to ensure validator versions stay up-to-date
- Remove hacky 20s wait for plugins to being installing. Wait for plugin
conditions to appear on ValidatorConfig instead.

Requires:
- validator-labs/validator#333

---------

Signed-off-by: Tyler Gillson <tyler.gillson@gmail.com>

.gitleaksignore

@@ -4,3 +4,4 @@ e7156f3be822e9da88949cd9405e8eedde836e5f:tests/integration/_validator/testcases/
 e7156f3be822e9da88949cd9405e8eedde836e5f:tests/integration/_validator/testcases/data/validator.yaml:generic-api-key:51
 481cdf910c0bc555363ae4278b2f57a66a72ed6b:tests/integration/_validator/testcases/data/validator.yaml:generic-api-key:27
 481cdf910c0bc555363ae4278b2f57a66a72ed6b:tests/integration/_validator/testcases/data/validator.yaml:generic-api-key:51
+hack/validator.tmpl:generic-api-key:538

Makefile

@@ -5,6 +5,7 @@ VERSION_SUFFIX ?= -dev
 VERSION ?= 0.0.4${VERSION_SUFFIX} # x-release-please-version
 
 ##@ Build Targets
+
 .PHONY: build
 build: ## Build CLI
 	@echo "Building CLI binary..."
@@ -26,6 +27,10 @@ build-release:  ## Build CLI for multiple platforms
 manifests:
 	@$(INFO) manifests: no-op
 
+reviewable-ext:
+	@$(INFO) Checking for validator version updates...
+	bash hack/update-versions.sh
+
 ##@ Test Targets
 
 COVER_DIR=_build/cov

hack/update-versions.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+function latestRelease {
+  release=$(gh release list --repo $1 -L 1 | head -n 2 | awk '{ print $1; }')
+  echo ${release:1}
+}
+
+function updateVersions {
+  envsubst < hack/versions.tmpl > pkg/config/versions.go
+  envsubst < hack/validator.tmpl > tests/integration/_validator/testcases/data/validator.yaml
+  echo "Updated versions.go & test data with latest validator versions."
+}
+
+export AWS_VERSION=$(latestRelease validator-labs/validator-plugin-aws)
+export AZURE_VERSION=$(latestRelease validator-labs/validator-plugin-azure)
+export KUBESCAPE_VERSION=$(latestRelease validator-labs/validator-plugin-kubescape)
+export MAAS_VERSION=$(latestRelease validator-labs/validator-plugin-maas)
+export NETWORK_VERSION=$(latestRelease validator-labs/validator-plugin-network)
+export OCI_VERSION=$(latestRelease validator-labs/validator-plugin-oci)
+export VSPHERE_VERSION=$(latestRelease validator-labs/validator-plugin-vsphere)
+export VALIDATOR_VERSION=$(latestRelease validator-labs/validator)
+
+updateVersions