Fix longevity test runs (nginxinc#2065) (#3)

* Fix longevity test runs (nginxinc#2065)

Problem:
Running longevity test mistakenly runs all other NFRs
make start-longevity-test and make stop-longevity-test mistakenly
executes all NFRs. Only longevity test must run.

Solution:
Problem was introduced in 18671fb
Ensure the env variables are exported so that they are passed to nfr-test target.

Testing:
- Ran make start-longevity-test and make stop-longevity-test successfully.

CLOSES - nginxinc#2064

* test notes

---------

Co-authored-by: Michael Pleshakov <pleshakov@users.noreply.github.com>

.github/workflows/release-pr.yml

@@ -18,6 +18,8 @@ permissions:
 jobs:
   release:
     runs-on: ubuntu-22.04
+    permissions:
+      contents: write
     steps:
       - name: Branch
         id: branch

tests/Makefile

@@ -100,11 +100,11 @@ nfr-test: ## Run the NFR tests on a GCP VM
 	NFR=true bash scripts/run-tests-gcp-vm.sh
 
 .PHONY: start-longevity-test
-start-longevity-test: START_LONGEVITY=true
+start-longevity-test: export START_LONGEVITY=true
 start-longevity-test: nfr-test ## Start the longevity test to run for 4 days in GKE
 
 .PHONY: stop-longevity-test
-stop-longevity-test: STOP_LONGEVITY=true
+stop-longevity-test: export STOP_LONGEVITY=true
 stop-longevity-test: nfr-test ## Stop the longevity test and collects results
 
 .PHONY: .vm-nfr-test