Expose bytecode common utilities as SPI

Currently both Hibernate ORM and Hibernate OGM require to apply similar strategy loader to handle full compatibility between different Byte Buddy and JDK versions, for JDK 9+.
We would like to allow Hibernate OGM, or others frameworks, to use the same method as SPI.
See issue OGM-1488.

To handle this we could move the method org.hibernate.bytecode.internal.bytebuddy.ByteBuddyState#resolveClassLoadingStrategy under the package org.hibernate.bytecode.spi.