chore: fix ssr tests

[bluwy]

Description

Add page.goto for each tests as custom servers need t manually navigate to it on each test.

Also add networkidle to first ssr-vue test as it triggers vuex optimization, which affects following tests.

Additional context

From #7568 (comment)

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
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