Dockerfile: update Renode to 1.15.2

[fkokosinski]

This commit updates the Renode version that is used in the Dockerfile to 1.15.2.

Release notes: https://github.com/renode/renode/releases/tag/v1.15.2

[fkokosinski]

It looks like the errors reported in CI are unrelated to my change. linux/amd64 fails with:

Error: Executing the custom container implementation failed. Please contact your self hosted runner administrator.

linux/arm64 ultimately fails with the same message as above, but also reports the following error:

Error: building at STEP "RUN python3 -m pip install -U --no-cache-dir pip && 	pip3 install -U --no-cache-dir wheel setuptools && 	pip3 install --no-cache-dir pygobject && 	pip3 install --no-cache-dir 		-r https://raw.githubusercontent.com/zephyrproject-rtos/zephyr/main/scripts/requirements.txt 		-r https://raw.githubusercontent.com/zephyrproject-rtos/mcuboot/main/scripts/requirements.txt 		GitPython imgtool junitparser junit2html numpy protobuf PyGithub 		pylint sh statistics west 		nrf-regtool>=5.3.0 && 	pip3 check": exit status 1
Error: Error: failed to run script step: command terminated with non-zero exit code: Error executing in Docker Container: 1
Error: Process completed with exit code 1.

Which is the same as experienced in #194.

[nashif]

rebase please

[fkokosinski]

@nashif rebase done