Move the textual simplification of container type to debugger again

This is the only user, and likely will stay so for a while, and
eases the linking of the debugger autotests.

Change-Id: I822fa892f105a5b7985370b26e50aa94cac74bb3
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>
Doc: Adjust to the removal of support for non-python gdb builds

Change-Id: Ide2e22ecc309cee3b5e1f48d2e4f38b997d03a12
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>