Suppress KeyboardInterrupt tracebacks from MCPServer.run #2501

Job	Run time
checks / pre-commit	34s
checks / readme-snippets	15s
checks / test (3.10, lowest-direct, windows-latest)	1m 22s
checks / test (3.12, locked, ubuntu-latest)	55s
checks / test (3.14, lowest-direct, ubuntu-latest)	53s
checks / test (3.11, lowest-direct, ubuntu-latest)	48s
checks / test (3.13, lowest-direct, ubuntu-latest)	55s
checks / test (3.11, lowest-direct, windows-latest)	1m 57s
checks / test (3.10, lowest-direct, ubuntu-latest)	55s
checks / test (3.11, locked, windows-latest)	1m 44s
checks / test (3.13, locked, windows-latest)	1m 20s
checks / test (3.10, locked, ubuntu-latest)	51s
checks / test (3.12, lowest-direct, windows-latest)	1m 46s
checks / test (3.10, locked, windows-latest)	1m 4s
checks / test (3.13, locked, ubuntu-latest)	48s
checks / test (3.12, locked, windows-latest)	1m 19s
checks / test (3.13, lowest-direct, windows-latest)	1m 16s
checks / test (3.12, lowest-direct, ubuntu-latest)	53s
checks / test (3.14, lowest-direct, windows-latest)	1m 10s
checks / test (3.11, locked, ubuntu-latest)	48s
checks / test (3.14, locked, ubuntu-latest)	1m 55s
checks / test (3.14, locked, windows-latest)	1m 57s
all-green	4s
	25m 29s

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