Build: Always use local `tmp` dir on macOS. (#12742) #11971

Job	Run time
changes	8s
Build	13m 52s
test-go	4m 15s
Chart / Lint	42s
Verify Doc generation	14s
Chart / Test (v1.26.15)	18m 14s
Chart / Test (v1.27.16)	17m 19s
Chart / Test (v1.28.15)	18m 22s
Chart / Test (v1.29.12)	17m 39s
Chart / Test (v1.30.8)	17m 52s
Kubernetes chroot (v1.26.15) / Kubernetes CHROOT	47m 44s
Kubernetes chroot (v1.27.16) / Kubernetes CHROOT	45m 33s
Kubernetes chroot (v1.28.15) / Kubernetes CHROOT	45m 48s
Kubernetes chroot (v1.29.12) / Kubernetes CHROOT	45m 36s
Kubernetes chroot (v1.30.8) / Kubernetes CHROOT	44m 55s
Kubernetes (v1.26.15) / Kubernetes	49m 15s
Kubernetes (v1.27.16) / Kubernetes	45m 8s
Kubernetes (v1.28.15) / Kubernetes	44m 55s
Kubernetes (v1.29.12) / Kubernetes	46m 0s
Kubernetes (v1.30.8) / Kubernetes	45m 34s
Kubernetes with Validations (v1.26.15) / Kubernetes VALIDATIONS	52m 42s
Kubernetes with Validations (v1.27.16) / Kubernetes VALIDATIONS	46m 58s
Kubernetes with Validations (v1.29.12) / Kubernetes VALIDATIONS	45m 25s
Kubernetes with Validations (v1.30.8) / Kubernetes VALIDATIONS	50m 28s
Kubernetes with Validations (v1.28.15) / Kubernetes VALIDATIONS	46m 2s
	13h 30m 40s

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