Change the alignment of buttons in the variables drawer to match guidelines

Release notes

Problem to solve

The contextual actions in a drawer should be left aligned https://design.gitlab.com/components/drawer The `Add/Edit Variable drawer has it right aligned.

Before	After

Intended users

User experience goal

Left aligned, except in right-to-left languages where they are right aligned and the order is the same.

Proposal

left align the buttons.

Further details

Permissions and Security

Documentation

Availability & Testing

Available Tier

Feature Usage Metrics

What does success look like, and how can we measure that?

What is the type of buyer?

Is this a cross-stage feature?

What is the competitive advantage or differentiation for this feature?

Links / references

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