[lldb-dap] Increase DAP default timeout (#170890)
DAP tests easily timeout when the computer is under-load.
This is easily noticeable if you run the test in a loop a compile llvm.
or running the test on slower CI/machines.
This affects mostly the `DAP_launch`, `DAP_attach`,
`DAP_restart_console` and occasionally `DAP_output` tests.
Would lead in the direction of enabling some of the test on windows.
```
File "/Volumes/workspace/Dev/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-dap/dap_server.py", line 1140, in request_launch
return self._send_recv(command_dict)
File "/Volumes/workspace/Dev/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-dap/dap_server.py", line 548, in _send_recv
raise ValueError(f"no response for {request!r}")
ValueError: no response for {'command': 'launch', 'type': 'request', 'arguments': {'program': '/Volumes/workspace/Dev/llvm-build/release/lldb-test-build.noindex/tools/lldb-dap/restart/TestDAP_restart_console.test_basic_functionality/a.out', 'initCommands': ['settings clear --all', 'settings set symbols.enable-external-lookup false', 'settings set target.inherit-tcc true', 'settings set target.disable-aslr false', 'settings set target.detach-on-error false', 'settings set target.auto-apply-fixits false', 'settings set plugin.process.gdb-remote.packet-timeout 60', 'settings set symbols.clang-modules-cache-path "/Volumes/workspace/Dev/llvm-build/release/lldb-test-build.noindex/module-cache-lldb"', 'settings set use-color false', 'settings set show-statusline false'], 'console': 'integratedTerminal', 'disableASLR': False, 'enableAutoVariableSummaries': False, 'enableSyntheticChildDebugging': False, 'displayExtendedBacktrace': False}, 'seq': 2}
Config=arm64-/Volumes/workspace/Dev/llvm-build/release/bin/clang
----------------------------------------------------------------------
Ran 2 tests in 28.579s
```
Increase the DEFAULT_TIMEOUT from 10 to 50
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