intel-tbb: Fix install names on Darwin (#14650)

* intel-tbb: Fix install names on Darwin

Intel-TBB's libraries on Darwin are installed with "@rpath" prefixed
to their install names. This was found to cause issues building the root
package on Darwin due to libtbb not being found when running some of the
generated tools linking to it.

Follow example from other packages with the same issue and fixup up install
names for intel-tbb post install.

* intel-tbb: fix flake8 errors

var/spack/repos/builtin/packages/intel-tbb/package.py

@@ -7,6 +7,7 @@
 import glob
 import inspect
 import platform
+import sys
 
 
 class IntelTbb(Package):
@@ -201,3 +202,9 @@ def install(self, spec, prefix):
                           'tbb_config_generator.cmake')
             with working_dir(join_path(self.stage.source_path, 'cmake')):
                 inspect.getmodule(self).cmake(*cmake_args)
+
+    @run_after('install')
+    def darwin_fix(self):
+        # Replace @rpath in ids with full path
+        if sys.platform == 'darwin':
+            fix_darwin_install_name(self.prefix.lib)