Fix test get logs template uri test

[eapolinario]

Tracking issue

NA

Why are the changes needed?

TestGetLogsTemplateUri would fail with error:

    common_operator_test.go:216:
                Error Trace:    /Users/eduardo/repos/flyte-copy/flyteplugins/go/tasks/plugins/k8s/kfoperators/common/common_operator_test.go:216
                Error:          Not equal:
                                expected: "https://console.cloud.google.com/logs/query;query=resource.labels.pod_name=test-worker-0&timestamp>2022-01-01T12:00:00Z"
                                actual  : "https://console.cloud.google.com/logs/query;query=resource.labels.pod_name=test-worker-0&timestamp>2022-01-01T04:00:00-08:00"

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1 +1 @@
                                -https://console.cloud.google.com/logs/query;query=resource.labels.pod_name=test-worker-0&timestamp>2022-01-01T12:00:00Z
                                +https://console.cloud.google.com/logs/query;query=resource.labels.pod_name=test-worker-0&timestamp>2022-01-01T04:00:00-08:00
                Test:           TestGetLogsTemplateUri

The reason being the discrepancy between local and CI environments, in the former (e.g. Macos) the local timezone would be set, whereas in CI (i.e. linux) the local timezone would be unset, which would default to UTC. This discrepancy would cause this test to always fail when run locally.

What changes were proposed in this pull request?

Force the tests in this test suite to run on UTC using TestMain.

How was this patch tested?

Setup process

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• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

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