Avoid printing "Alternative API option(s):" when non are present

[zakkak]

Avoids output like the following:

[libjvmcicompiler:100878]  -H:ReportAnalysisForbiddenType
[libjvmcicompiler:100878]    Origin: macro option 'jvmcicompiler-library@file:///home/zakkak/code/graal/sdk/mxbuild/linux-amd64/GRAALVM_9777A156F1_JAVA21_STAGE1/graalvm-9777a156f1-java21-23.1.0-dev/lib/svm/macros/jvmcicompiler-library/@user'
[libjvmcicompiler:100878]    Alternative API option(s): 
[libjvmcicompiler:100878]  -H:Path
[libjvmcicompiler:100878]    Origin: command line

[fniephaus]

Hi @zakkak, thanks for the PR. I'm already working on a number of UX fixes for the build output and this will be fixed as part of it. Essentially, we'll make the list more compact and only show one line per experimental option.

[fniephaus]

Closing this in favor or #7222. Here's the relevant part: https://github.com/oracle/graal/pull/7222/files#diff-54ef73a23b10bd907d5869cc88b651fae7fef0467ccfaf8f50472cdd1e114eceR286-R303