Conan profile configuration doesn't work at first

[sassy-asjp]

Describe the bug
As noted in #523, the conanfile.py tries to run some configuration steps, but it doesn't actually work as intended. It will work on subsequent runs since conan is already configured, however for the first run, the updated configuration doesn't get loaded properly.

To reproduce
Steps to reproduce the behavior:

1. From a new Linux user account (or delete your account's ~/.conan)
2. Follow the instructions to build Basilisk
3. Some features such as vizInterface will not work due to ABI incompatibility

Expected behavior
The build to work properly the first time

Desktop (please complete the following information):

• OS: Linux
• Version Ubuntu 22.04.3 LTS
• Python version 3.11.6

Additional context
The easiest method is to have the user configure the conan settings before building Basilisk instead of configuring it inside the conanfile.

conan profile new default --detect
conan profile update settings.compiler.libcxx=libstdc++11 default # only on Linux

This would also avoid mangling the user's default conan profile if the user wants to use it for something else. It may also be good to allow the user to easily specify what conan profile to use.