swtpm: upgrade to jammy fails

[Impact]

 * swtpm did not use to exist in ubuntu
 * prior to packaging in ubuntu, it was common to compile and use swtpm debian packaging as provided by upstream
 * ubuntu packaging is incompatible with upstream provided one, and upgrades to ubuntu package do not work automatically, despite same naming for some of the packaging

[Test Plan]

 * build and install swtpm & swtpm-libs deb packages from https://github.com/stefanberger/swtpm

 * Attempt to upgrade to ubuntu's provided swtpm

 * The upgrade should automatically break/replace and remove swtpm-libs package that is not used in Ubuntu, and conflicts with swtpm package.

[Where problems could occur]

 * Inverse change may be required in upstream packaging, if they wish to support upgrading from Ubuntu packages to Upstream provided ones.

[Other Info]

 * Original bug report

While trying to upgrade from impish to jammy I get:

Preparing to unpack .../swtpm_0.6.1-0ubuntu5_amd64.deb ...
Unpacking swtpm (0.6.1-0ubuntu5) over (0.6.1) ...
dpkg: error processing archive /var/cache/apt/archives/swtpm_0.6.1-0ubuntu5_amd64.deb (--unpack):
 trying to overwrite '/usr/lib/x86_64-linux-gnu/swtpm/libswtpm_libtpms.so.0.0.0', which is also in package swtpm-libs:amd64 0.6.1
Errors were encountered while processing:
 /var/cache/apt/archives/swtpm_0.6.1-0ubuntu5_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

I had previously installed the swtpm package using the upstream source as the package was not available for Impish.

Best regards

Heinrich