[Ports]: Backport client side changes for 1.61

[microsoft-playwright-automation]

Please backport client side changes:

• chore(python): formdata path type playwright#40693
• fix(trace-viewer): strip event handlers and neutralize IFRAME srcdoc/sandbox in snapshot renderer playwright#40676
• feat(electron): move Electron API to a separate package playwright#40184
• fix(tools): validate user-provided regex patterns in MCP tools playwright#40752
• chore(protocol): replace EventTarget interface with __waitInfo__ message playwright#40718
• fix(trace-viewer): neutralize object and embed tags in snapshot renderer playwright#40761
• fix(utils): fix polynomial backtracking in ansiRegex playwright#40762
• chore(trace): track snapshot targets via generation counter playwright#40766
• chore: remove missingDocs playwright#40777
• chore(page): split protocol close into close and runBeforeUnload playwright#40780