all reports with LaunchpadPrivate in them are tagged need-$arch-retrace

[Brian Murray]

I was recently reviewing the crash reports which the Launchpad retracers handle and was surprised to see a bunch of ubuntu-advantage-tools reports that retracing was tried for even though they had a ProblemType of Bug. Looking at the ubuntu-advantage-tools apport package hook we can see that all the LaunchpadPrivate is set to 1, then looking at `apport/crashdb_impl/launchpad.py` there is:

1083 if "DistroRelease" in report:
1084 if a and (
1085 "VmCore" in report
1086 or "CoreDump" in report
1087 or "LaunchpadPrivate" in report
1088 ):
1089 hdr["Private"] = "yes"
1090 hdr["Subscribers"] = report.get(
1091 "LaunchpadSubscribe",
1092 self.options.get("initial_subscriber", "apport"),
1093 )
1094 hdr["Tags"] += f" need-{a}-retrace"

Adding need-$arch-retrace is incorrect if the ProblemType is Bug.

Here are some example bugs:

https://bugs.launchpad.net/ubuntu/+source/ubuntu-advantage-tools/+bug/2067076
https://bugs.launchpad.net/ubuntu/+source/ubuntu-advantage-tools/+bug/2066231