Fix remaining misuses of capturing the default file descriptors in flytectl unit tests #5347

Job	Run time
unpack-envvars	1s
flyteadmin integration tests image / build_docker	5m 0s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	4m 10s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	30s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	4m 27s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	6m 0s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	5m 40s
Dry Run Goreleaser	7m 21s
Test Getting started	7m 35s
Check Go Generate (datacatalog) / Go Generate	1m 33s
Check Go Generate (flyteadmin) / Go Generate	2m 20s
Check Go Generate (flytectl) / Go Generate	2m 0s
Check Go Generate (flytecopilot) / Go Generate	1m 22s
Check Go Generate (flytepropeller) / Go Generate	2m 15s
Lint (datacatalog) / Run Lint	2m 26s
Lint (flyteadmin) / Run Lint	2m 50s
Lint (flytectl) / Run Lint	2m 45s
Lint (flyteidl) / Run Lint	1m 50s
Lint (flyteplugins) / Run Lint	2m 59s
Lint (flytepropeller) / Run Lint	3m 6s
Lint (flytestdlib) / Run Lint	2m 27s
Unit Tests (datacatalog) / Run Unit Test	3m 2s
Unit Tests (flyteadmin) / Run Unit Test	4m 23s
Unit Tests (flytecopilot) / Run Unit Test	2m 30s
Unit Tests (flytectl) / Run Unit Test	3m 26s
Unit Tests (flyteplugins) / Run Unit Test	3m 48s
Unit Tests (flytestdlib) / Run Unit Test	3m 35s
Unit Tests (flytepropeller) / Run Unit Test	4m 9s
Integration Test (flyteadmin) / Integration tests	6m 2s
	1h 39m 32s

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