TCP connection proxying

Remote test runs can now forward raw TCP connections to fixed localhost ports on your machine, particularly useful for proxying to local databases.

Major features & improvements

• proxyNetworkPorts config option: Lets remote runners connect to specific localhost ports on your machine.
• Project testDir support: We now support project specific testDir parameters in Playwright config.
• More than 10 tests per file with fullyParallel: false: Test files with more than 10 tests now run correctly when fullyParallel is set to false in Playwright config.