Python Bindings: Subsequent local build and install fails

[rcrdnalor]

• Platform: Ubuntu 23.04

• MythTV version: 2:34.0~master.202401100449.498b5a817a

• Package version: 2:34.0 master.202401100449.498b5a817a~ubuntu23.04.1

• Component: Python Bindings

What steps will reproduce the bug?

When building and installing MythTV locally,
a make install fails if the Python-Bindings of the current MythTV version are already installed.

Excerpt from the install log:

python3 -m pip install  --prefix="<some_prefix>" --no-build-isolation --no-cache-dir --no-index --disable-pip-version-check --no-deps --find-links ./dist MythTV
Looking in links: ./dist
Requirement already satisfied: MythTV in /usr/lib/python3/dist-packages (34.0) 

If the MythTVs Python-Bindings of the current MythTV version are not already installed,
the log of make install shows:

python3 -m pip install  --prefix="<some_prefix>" --no-build-isolation --no-cache-dir --no-index --disable-pip-version-check --no-deps --find-links ./dist MythTV
Looking in links: ./dist
Processing ./dist/MythTV-34.0-py3-none-any.whl
Installing collected packages: MythTV
Successfully installed MythTV-34.0

Thanks to Mark S. for reporting this issue and providing hints.