fix: dynamic e2e test timeout for slower local testing

Signed-off-by: Tom Plant <[email protected]>

Makefile

@@ -21,6 +21,8 @@ CONTAINER_TOOL ?= docker
 SHELL = /usr/bin/env bash -o pipefail
 .SHELLFLAGS = -ec
 
+E2E_TIMEOUT ?= 5m
+
 .PHONY: all
 all: build
 
@@ -68,7 +70,7 @@ test: manifests generate fmt vet envtest ## Run tests.
 # Utilize Kind or modify the e2e tests to load the image locally, enabling compatibility with other vendors.
 .PHONY: test-e2e  # Run the e2e tests against a Kind k8s instance that is spun up.
 test-e2e:
-	go test ./test/e2e/ -v -ginkgo.v -timeout 5m
+	go test ./test/e2e/ -v -ginkgo.v -timeout $(E2E_TIMEOUT)
 
 .PHONY: lint
 lint: golangci-lint ## Run golangci-lint linter