Fix: pipeline buy additional minutes link

What does this MR do and why?

One of JH test case is broken by a new feature flag in this MR.

The "Buy additional minutes" link in this file pipelines_quota/_list.html.haml won't be rendered if feature is enabled, see the code at usage_quotas/index.html.haml

Proposal

This feature default value is false and it won't change the behavior for staging or production, but the test case is not passed due to feature flags are enabled by default for testing environment. Then, the fix should be switching this feature flag to false for this case to fix pipeline job.

• set usage_quotas_pipelines_vue to false for this case.

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