Bump third_party/libwebsockets/repo from `ec6d5ac` to `7ef2065` #64157

Job	Run time
REPL Tests - Linux	36m 29s
Test Suites - Darwin (no-ble-asan-clang)	1h 42m 34s
Test Suites - Linux (no-ble-tsan-clang)	1h 45m 19s
Test Suites - Darwin (no-ble-tsan-clang)	2h 7m 10s
REPL Tests - Darwin	0s
	6h 11m 32s

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