[FIX] packaging: update rpm packaging for fedora 32

As Fedora 32 was the current release when Odoo 14.0 was released, this
should be the supported version.

Also, a few  old libs were still in mentioned in the packaging files.
They flew under the radar because they never broke the packaging.
This is not the case anymore, those libs disappeared from the Fedora
repos.

It seems that pyparsing is not used anymore since 5a1c06a1 and thus can
be safely removed from `requirements.txt` too.

pychart is not used anymore since 3425752e.

While at it, remove mix of tabs and spaces in package.dffedora, also add
missing packages to avoid installation at test time.

Now that I started down the slippery slope, also removed some `-dev`
packages in package.dfsrc as wheel's are available.

Finally, the rpm install script now detects the python ABI version in
order to avoid update this file at each ABI change in Fedora.

Fixes #63719

closes odoo/odoo#65224

Signed-off-by: Christophe Monniez (moc) <moc@odoo.com>