[Windows] Cannot be encoded into charset windows-1252 build error in LogManager

[jerboaa]

quarkusFullMicroProfile test with JDK 21/24 CI fails on Windows with:

build-and-run.log log should not contain error or warning lines that are not whitelisted. See D:\a\mandrel\mandrel\testsuite\target\archived-logs\org.graalvm.tests.integration.RuntimesSmokeTest\quarkusFullMicroProfile\build-and-run.log and check these offending lines: 
LogManager error of type GENERIC_FAILURE: Section header cannot be encoded into charset "windows-1252" ==> expected: <true> but was: <false>

It might be that we ought to set the encoding explicitly and not assume the default encoding which - I think - is windows-1252 on windows systems by default.

CI failure:
https://github.com/graalvm/mandrel/actions/runs/12092054635/job/33721720218#step:10:8946

[jerboaa]

Other CI failures (with the same issue):

https://github.com/graalvm/mandrel/actions/runs/12119015627/job/33786195712
https://github.com/graalvm/mandrel/actions/runs/12119015627/job/33786430194

[jerboaa]

https://github.com/graalvm/mandrel/actions/runs/12190610416/job/34008912174#step:10:8910 (JDK 24 windows failure)

[jerboaa]

This seems to be gone with latest CI runs. We'll see if it re-surfaces.

Past passing runs:
JDK 21: https://github.com/graalvm/mandrel/actions/runs/12208270272/job/34061839970
JDK 23: https://github.com/graalvm/mandrel/actions/runs/12208270272/job/34061821229
JDK 24: https://github.com/graalvm/mandrel/actions/runs/12226746912/job/34103269083 (failure not related to the encoding issue)