Fix remaining misuses of capturing the default file descriptors in flytectl unit tests #5359

Job	Run time
unpack-envvars	1s
flyteadmin integration tests image / build_docker	5m 3s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	12m 20s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	5m 28s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	4m 15s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	3m 22s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	5m 46s
Dry Run Goreleaser	7m 33s
Test Getting started	12m 10s
Check Go Generate (datacatalog) / Go Generate	6m 40s
Check Go Generate (flyteadmin) / Go Generate	2m 16s
Check Go Generate (flytecopilot) / Go Generate	1m 19s
Check Go Generate (flytectl) / Go Generate	8m 24s
Check Go Generate (flytepropeller) / Go Generate	2m 19s
Lint (datacatalog) / Run Lint	2m 22s
Lint (flyteadmin) / Run Lint	6m 56s
Lint (flytectl) / Run Lint	2m 51s
Lint (flyteidl) / Run Lint	6m 16s
Lint (flyteplugins) / Run Lint	2m 53s
Lint (flytepropeller) / Run Lint	3m 4s
Lint (flytestdlib) / Run Lint	3m 16s
Unit Tests (datacatalog) / Run Unit Test	2m 52s
Unit Tests (flyteadmin) / Run Unit Test	4m 59s
Unit Tests (flytecopilot) / Run Unit Test	2m 40s
Unit Tests (flytectl) / Run Unit Test	3m 29s
Unit Tests (flyteplugins) / Run Unit Test	3m 54s
Unit Tests (flytepropeller) / Run Unit Test	3m 49s
Unit Tests (flytestdlib) / Run Unit Test	3m 37s
Integration Test (flyteadmin) / Integration tests	2m 6s
	2h 12m 0s

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