log: tag log.fatal with @[noreturn]

[Le0Developer]

fixes #22985

Copilot summary:

This pull request includes changes to the logging functionality in the vlib/log module. The most important changes include adding the @[noreturn] attribute to the fatal function and introducing new test cases to ensure the correct behavior of the logging functions.

Improvements to logging functionality:

• vlib/log/default.v: Added the @[noreturn] attribute to the fatal function to indicate that it will not return, and ensured the function exits the program with exit(1) after logging a fatal message.

Enhancements to test cases:

• vlib/log/log_test.v: Added a new function make_error and a test case test_log_default_fatal_has_noreturn to verify that the fatal function behaves as expected and does not return.

_{Huly®: V_0.6-21427}

[spytheman]

Excellent work.