[lldb][Test] Remove some xfails for AArch64 Linux

PR #92245 fixed these tests on Linux. They likely work on FreeBSD too
but leaving the xfail for that so it can be confirmed later.

Also updated a bugzilla link to one that redirects to Github issues.

Relates to issues #43398 and #48751.

lldb/test/API/commands/expression/fixits/TestFixIts.py

@@ -106,9 +106,8 @@ def test_with_target_error_applies_fixit(self):
         )
         self.assertIn("null_pointer->first", ret_val.GetError())
 
-    # The final function call runs into SIGILL on aarch64-linux.
     @expectedFailureAll(
-        archs=["aarch64"], oslist=["freebsd", "linux"], bugnumber="llvm.org/pr49407"
+        archs=["aarch64"], oslist=["freebsd"], bugnumber="llvm.org/pr49407"
     )
     def test_with_multiple_retries(self):
         """Test calling expressions with errors that can be fixed by the FixIts."""

lldb/test/API/commands/expression/static-initializers/TestStaticInitializers.py

@@ -7,8 +7,8 @@
 class StaticInitializers(TestBase):
     @expectedFailureAll(
         archs="aarch64",
-        oslist=["freebsd", "linux"],
-        bugnumber="https://bugs.llvm.org/show_bug.cgi?id=44053",
+        oslist=["freebsd"],
+        bugnumber="llvm.org/pr44053",
     )
     def test(self):
         """Test a static initializer."""