The exported env var is exported as a numeric string (by removing the
dots from the version string), this has the benefit of making it simpler
to compare the version in shell arithmetic expressions.
This should help programms like neovim check if konsole has support
for terminal capabilities (e.g. DECSCUSR) by creating a condition
depending on the konsole version. See also:
https://github.com/neovim/neovim/issues/8300
CCBUG: 347323