[Feature]: Add aria snapshot raw saving

[vincenzo-gasparo]

🚀 Feature Request

As a user I want to have an option that allows to save generated aria snapshot .yml files in raw mode, without generating regular expressions.

Example

Should save aria snapshot in raw mode:

      import { test, expect } from '@playwright/test';
      import fs from 'fs';
      test('test', async ({ page }) => {
        await page.setContent(\`<h1>hello world 123</h1>\`);
        await expect(page.locator('body')).toMatchAriaSnapshot({ name: 'test.aria.yml', exact: true });
        expect(fs.readFileSync('a.spec.ts-snapshots/test.aria.yml', {encoding: 'utf8'})).toEqual('- heading "hello world 123" [level=1]');
      });

Should save aria snapshot in regex mode:

      import { test, expect } from '@playwright/test';
      import fs from 'fs';
      test('test', async ({ page }) => {
        await page.setContent(\`<h1>hello world 123</h1>\`);
        await expect(page.locator('body')).toMatchAriaSnapshot({ name: 'test.aria.yml', exact: false });
        expect(fs.readFileSync('a.spec.ts-snapshots/test.aria.yml', {encoding: 'utf8'})).toEqual('- heading /hello world \\d+/ [level=1]');
      });

Motivation

Sometimes I need to check exact values (data calculation or mocked data) and this is the fastest way to achieve the result

[lukpsaxo]

what exactly does "exact" mean because it seems you are meaning it to just mean not having a regex. There is some overlap with the fact that toMatchAriaSnashot does a partial match (this issue - #36442) and I would kind of expect if I am using "exact" that it means it is not a partial match.

Maybe the option just needs a different name or automatically doesn't have regex when saving to yml

[agg23]

That's a fair point. In #38075 we are referring to the two states as raw and relaxed, where relaxed indicates it's more fuzzy due to the regex matchers. Do you consider this to be sufficient?