Fix remaining misuses of capturing the default file descriptors in flytectl unit tests #5360

Job	Run time
unpack-envvars	1s
flyteadmin integration tests image / build_docker	6m 14s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	5m 27s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	4m 33s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	1m 12s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	4m 3s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	5m 29s
Dry Run Goreleaser	8m 6s
Test Getting started	7m 8s
Lint (datacatalog) / Run Lint	2m 23s
Lint (flyteadmin) / Run Lint	3m 40s
Lint (flytectl) / Run Lint	2m 31s
Lint (flyteidl) / Run Lint	2m 7s
Lint (flyteplugins) / Run Lint	4m 1s
Lint (flytepropeller) / Run Lint	3m 8s
Check Go Generate (datacatalog) / Go Generate	1m 30s
Check Go Generate (flyteadmin) / Go Generate	2m 33s
Check Go Generate (flytecopilot) / Go Generate	1m 21s
Check Go Generate (flytectl) / Go Generate	3m 0s
Check Go Generate (flytepropeller) / Go Generate	2m 9s
Lint (flytestdlib) / Run Lint	2m 34s
Unit Tests (datacatalog) / Run Unit Test	2m 57s
Unit Tests (flyteadmin) / Run Unit Test	4m 26s
Unit Tests (flytecopilot) / Run Unit Test	2m 42s
Unit Tests (flyteplugins) / Run Unit Test	3m 48s
Unit Tests (flytectl) / Run Unit Test	3m 23s
Unit Tests (flytepropeller) / Run Unit Test	4m 10s
Unit Tests (flytestdlib) / Run Unit Test	3m 56s
Integration Test (flyteadmin) / Integration tests	7m 2s
	1h 45m 34s

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