Run NFR tests on 1st and 15th of every month (#2249) #6822

Job	Run time
Checks and variables	1m 23s
Unit Tests	1m 15s
NJS Unit Tests	12s
Build Binary	19s
Build Plus images / build	1m 25s
Build OSS images (ngf, linux/arm64, linux/amd64) / build	1m 10s
Build OSS images (nginx, linux/arm64, linux/amd64) / build	56s
Helm Tests	0s
Conformance tests (nginx, v1.25.16, false) / Run Tests	6m 6s
Conformance tests (nginx, v1.25.16, true) / Run Tests	5m 47s
Conformance tests (nginx, v1.30.2, false) / Run Tests	5m 32s
Conformance tests (nginx, v1.30.2, true) / Run Tests	5m 12s
Conformance tests (plus, v1.25.16, false) / Run Tests	6m 25s
Conformance tests (plus, v1.25.16, true) / Run Tests	6m 3s
Conformance tests (plus, v1.30.2, false) / Run Tests	6m 41s
Package and Publish Helm Chart	0s
Conformance tests (plus, v1.30.2, true) / Run Tests	5m 56s
Functional tests (nginx, v1.25.16) / Run Tests	8m 52s
Functional tests (plus, v1.25.16) / Run Tests	8m 50s
Functional tests (nginx, v1.30.2) / Run Tests	9m 1s
Functional tests (plus, v1.30.2) / Run Tests	8m 33s
	1h 29m 38s

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