18962: pkg/lwip: Force loglevel when using log module r=maribu a=yarrick
18999: Paho: Allow building for 8 and 16 bit platforms r=maribu a=OlegHahm
### Contribution description
Providing a patch to Paho upstream which uses fixed size integers (int32_t) instead of plain int whenever it is used to represent a size of an object.
This patch will allow to build the Paho package for platforms where an integer has a width of less than 32 bit.
This patch is also provided as a PR to the upstream version of Paho (https://github.com/eclipse/paho.mqtt.embedded-c/pull/238) but unfortunately the upstream seems to be unmaintained.
### Testing procedure
Build for a 8 or 16 bit platform that has enough memory for the example, e.g., https://api.riot-os.org/group__boards__atxmega-a1u-xpro.html:
BUILD_IN_DOCKER=1 BOARD=atxmega-a1u-xpro make clean all
Without this PR this build will fail, with the patches applied it will succeed.
### Issues/PRs references
This PR makes #18997 obsolete and thus reverts the change.
19034: boards/nucleo-l496zg: doc improvement r=maribu a=krzysztof-cabaj
### Contribution description
This PR adds to nucleo-l496zg documentation MCU table - similar to those, for example for, Nucleo F103RB, F302R8 or F446RE.
### Testing procedure
```
make doc
xdg-open doc/doxygen/html/group__boards__nucleo-l496zg.html
```
### Issues/PRs references
None
Co-authored-by: Erik Ekman <eekman@google.com>
Co-authored-by: Oleg Hahm <oleg@hobbykeller.org>
Co-authored-by: krzysztof-cabaj <kcabaj@gmail.com>
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