darwintrace: Disable broken tests on arm64

Let's not break CI on arm64, even though this test failure points to an
actual problem.

src/darwintracelib1.0/tests/proc.test

@@ -7,6 +7,8 @@ package require Pextlib 1.0
 
 source "testlib.tcl"
 
+testConstraint notarm64 [expr {[exec -ignorestderr -- /usr/bin/arch] ne "arm64"}]
+
 test execve_selfpreserving_env "Test that you cannot get out of the sandbox by unsetting environment variables" \
     -setup [setup [list allow $cwd]] \
     -cleanup [expect] \
@@ -204,7 +206,12 @@ test spawn_non_existing_inside_sandbox "Test that posix_spawn(2) on a non-existi
     } \
     -result [lrepeat 2 "posix_spawn: No such file or directory"]
 
+# This test is currently broken on arm64, because Apple compiles its SIP-protected binaries with
+# pointer authenticaation using the arm64e architecture, but marks it as a preview and only allows
+# Apple-signed binaries, or arbitrary binaries on systems that are booted with
+# boot-args=-arm64e_preview_abi (which cannot be enabled without disabling SIP).
 test spawn_sip_binary "Test that posix_spawn(2) works on a SIP-protected binary (which will make a copy)" \
+    -constraints {notarm64} \
     -setup {
         file delete -force [file join $::env(DARWINTRACE_SIP_WORKAROUND_PATH) [getuid] usr/bin/env]
         [setup [list allow /]]
@@ -223,7 +230,12 @@ test spawn_sip_binary "Test that posix_spawn(2) works on a SIP-protected binary
     -match glob \
     -result [list "DARWINTRACE_LOG=/tmp/macports-test-*" "DYLD_INSERT_LIBRARIES=$darwintrace_lib" 1]
 
+# This test is currently broken on arm64, because Apple compiles its SIP-protected binaries with
+# pointer authenticaation using the arm64e architecture, but marks it as a preview and only allows
+# Apple-signed binaries, or arbitrary binaries on systems that are booted with
+# boot-args=-arm64e_preview_abi (which cannot be enabled without disabling SIP).
 test spawn_sip_script "Test that posix_spawn(2) works on a SIP-protected shell script (which will copy the interpreter)" \
+    -constraints {notarm64} \
     -setup [setup [list allow /]] \
     -cleanup [expect {}] \
     -body {exec -ignorestderr -- ./posix_spawn /usr/bin/umask} \