Correctly handle removal of failed tpu binNMUs in "easy"s or "hint"s

Signed-off-by: Adam D. Barratt <adam@adam-barratt.org.uk>

This extends the scope of commit 5e3a245759
to include cases where the tpu binNMUs are explicitly included in an "easy"
or "hint" rather than processed as part of the main run.

britney.py

@@ -2444,9 +2444,9 @@ class Britney:
                 if pkg[0] != '-' and pkg_name in self.sources[suite]:
                     for p in self.sources[suite][pkg_name][BINARIES]:
                         binary, arch = p.split("/")
-                        if "/" in pkg and arch != pkg[pkg.find("/")+1:]: continue
+                        if '/' not in pkg or pkg.endswith("/%s" % (arch)) or pkg.endswith("/%s_tpu" % (arch)):
-                        del self.binaries['testing'][arch][0][binary]
+                            del self.binaries['testing'][arch][0][binary]
-                        self.systems[arch].remove_binary(binary)
+                            self.systems[arch].remove_binary(binary)
 
                 # undo the changes (binaries)
                 for p in undo['binaries'].keys():