refactor(server): convert cdp_automation promise chains to async/await

[AtofStryker]

• Closes N/A — mechanical modernization, no associated issue (explained below)

Additional details

Stacked on #34244 (refactor/automation_client_p1) — this PR targets that branch and only adds the one commit.

This converts packages/server/lib/browsers/cdp_automation.ts off bluebird and .then/.catch chains onto native async/await. It is intended to be behavior neutral — no logic, ordering, or error-handling changes:

• getAllCookies / getCookiesByUrl / getCookie become async functions; the explicit CDP response type annotations move from the callback parameters onto the awaited consts
• the onRequest cases for set:cookie, set:cookies, clear:cookie, and take:screenshot await inline instead of chaining, preserving the same error messages and result shapes
• Bluebird.mapSeries in clear:cookies becomes a sequential for...of loop — same serial execution (each cookie fetched and deleted before the next) and the same undefined entries in the result array for cookies that no longer exist
• _updateFrameTree's new Promise with an async executor becomes an async IIFE with identical resolution semantics (never rejects, nulls the in-flight marker before resolving)

Deliberately left as-is: the two new Promise constructions in activateMainTab (an event-listener wait and a timeout race — the constructor is the right tool there), the intentionally unawaited .catch in _continueRequest (swallows late Invalid InterceptionId errors so they can't crash Cypress), and the already-native Promise.all in reset:browser:state.

This removes the last bluebird usage from this file, though bluebird remains a dependency of other server modules.

Steps to test

No behavior change to validate — the existing suites cover every converted path:

yarn workspace @packages/server test-unit -- cdp_automation_spec   # cookies, screenshot, frame tree (45 tests)
yarn workspace @packages/server test-unit -- automation            # broader automation specs (128 tests)

Also verified green: chrome_spec, electron_spec, cri-client_spec (consumers of CdpAutomation), check-ts, and lint.

How has the user experience changed?

No change.

PR Tasks

• [na] Is there an associated issue with maintainer approval for PR submission? — purely mechanical conversion, no behavior change
• [na] Have tests been added/updated? — intentionally none; the existing specs pin the behavior being preserved
• [na] Has a PR for user-facing changes been opened in cypress-documentation?
• [na] Have API changes been updated in the type definitions?

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Note

Low Risk
Behavior-neutral style modernization in CDP automation with no intended logic or ordering changes; existing unit specs cover the touched paths.

Overview
Mechanical refactor in cdp_automation.ts: drops the bluebird import and rewrites cookie helpers, frame-tree updates, and several onRequest branches to native async/await instead of .then/.catch chains.

Cookie paths (getAllCookies, getCookiesByUrl, getCookie) and automation cases (set:cookie, set:cookies, clear:cookie, take:screenshot) keep the same CDP calls, error text, and return shapes; CDP response types are annotated on awaited results. clear:cookies replaces Bluebird.mapSeries with a sequential for...of loop that still deletes one cookie at a time and still pushes undefined when a cookie is missing. _updateFrameTree uses an async IIFE instead of new Promise with an async executor, with the same non-rejecting behavior and gettingFrameTree cleanup.

Intentionally unchanged: activateMainTab’s listener/timeout Promise usage, the unawaited .catch on Fetch.continueRequest, and Promise.all in reset:browser:state.

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[cypress]

cypress    Run #72200

Run Properties:   Passed #72200  •  ec4798a0af: refactor(server): convert cdp_automation promise chains to async/await

Project	cypress
Branch Review	refactor/automation_client_p2
Run status	Passed #72200
Run duration	19m 55s
Commit	ec4798a0af: refactor(server): convert cdp_automation promise chains to async/await
Committer	Bill Glesias
View all properties for this run ↗︎

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Test results
Failures	0
Flaky	7
Pending	1124
Skipped	0
Passing	26363
View all changes introduced in this branch ↗︎

UI Coverage  0%
Untested elements	4
Tested elements	0

Accessibility  100%
Failed rules	0 critical   0 serious   0 moderate   0 minor
Failed elements	0