feat(test): support default tags via test.use() and project use

[403-html]

Adds tag as a recognized option in test.use() and project.use, so default tags can be declared where fixtures live rather than repeated on every test.

// file-level
test.use({ tag: '@app1' });
test.use({ tag: ['@app1', '@app2'] });

// project-level
projects: [{ name: 'app1', use: { tag: '@app1' } }]
projects: [{ name: 'app1', use: { tag: ['@app1', '@app2'] } }]

Tags accumulate across all scopes (project → file → describe → test).

Closes #37128, closes #37683 (reopening since the idea was closed despite 7 upvotes)

[403-html]

@microsoft-github-policy-service agree

[dgozman]

The issue is closed because playwright team decided it is not worth the complexity.