[GR-45806] Execute bootstrap methods at run time

[graalvmbot]

The goal of this PR is to execute potentially dangerous bootstrap methods at run time instead of at build time.

There are now three types of bootstrap methods:

• Executed at build time. Those are hardcoded in the JDK and are considered safe.
• Intrinsified at build time. They are considered safe similarly to the previous ones, but instead of executing the bootstrap method and replacing it with the callsite, they are intrinsified. This currently only applies to makeConcatWithConstants.
• Executed at run time. Those are the default bootstrap methods, which can be either methods from the JDK, or user methods.

Note that without openjdk/jdk#14927, all bootstrap methods are either executed or intrinsified at build-time. This changes with the JDK pull request as the call site is not automatically linked when we retrieve the bootstrap method.