Failing tests on AArch64/RISC-V

These tests currently fail on AArch64 and RISC-V:

AArch64:

• AK/TestComplex: Tests from_polar_magnitude and from_polar_phase fail #26669
• Kernel/crash: Division by zero doesn't cause a signal #26001
• LibC/TestFenv: TODO_AARCH64s in aarch64/fenv.cpp #26697
• LibC/TestLibCSetjmp: Crash, {set,sigset,long}jmp aren't implemented on AArch64 #26000
• LibC/TestMath: Crash, internal_gamma always uses rintl, but long double math functions are unimplemented on AArch64
• LibGfx/TestDeltaE: Multiple EXPECT_APPROXIMATEs fail #26691 (probably?)
• LibPDF/TestPDF: Test postscript fails #26691
• test-js: Math.tan.js fails, hangs during builtins/Intl/NumberFormat/NumberFormat.prototype.format.js (#26599)
• Crash tests cause CrashReporter popus even if they crash expectedly (maybe because the kernel always raises SIGSEGV for all hardware exceptions?) #26041
• TestEFault is currently disabled on AArch64: https://github.com/SerenityOS/serenity/blob/93add0a510fe656a56585c124a59efa45b347feb/Tests/Kernel/CMakeLists.txt#L74 because AArch64 is missing SafeMem implementations that don't panic if the kernel fails to access userspace memory #26002

RISC-V:

• AK/TestComplex: Tests from_polar_magnitude and from_polar_phase fail #26669
• LibC/TestMath: Crash, internal_gamma always uses rintl, but long double math functions are unimplemented on RISC-V
• LibGfx/TestDeltaE: Multiple EXPECT_APPROXIMATEs fail #26691 (probably?)
• LibPDF/TestPDF: Test postscript fails #26691
• test-js: Math.tan.js fails, hangs during builtins/Intl/NumberFormat/NumberFormat.prototype.format.js (#26599)

These tests fail on RISC-V if the time wan't set by ntpquery -s (and likely also on AArch64/x86-64 if the time isn't set correctly):

• LibC/TestLibCTime: Test tzset fails #26698
• LibTLS/TestTLSHandshake: Test test_TLS_hello_handshake fails #26698
• test-js: Multiple Date tests fail #26698

All tests that fail on RISC-V also fail on AArch64. These common test failures seem to all be caused by missing/inaccurate math functions.