Refactor - Splits SBPF program test crates into deps to remove cfg feature program

[Lichtso]

This PR is split off from #1581.

Problem

We want to use the normal cargo workspace build procedure instead of using a build.rs script.
Currently some test program crates export a part of their interface to others (for CPI) and to do so they utilize a cfg feature program. That cfg feature toggles if the crate is build as a dependency / lib for another crate or as a standalone test program. However, with workspaces that won't work anymore because in a workspace each crate can only be build with one feature set. Additionally, some program test crates are already split into a dep crate, so it is currently somewhat inconsistent.

Summary of Changes

Splits the following into a separate dep crate each:

• "invoke"
• "invoked"
• "realloc"
• "realloc-invoke"

For each this:

• Adjusts the crate-type and dependencies in the Cargo.toml accordingly
• Removes program cfg feature
• Moves processor.rs into the lib.rs of the existing crate
• Moves instructions.rs into the lib.rs of a new crate

Also cleans up the following without splitting (as they were never used as dependencies elsewhere):

• "log_data"
• "sibling_instructions"
• "sibling_inner_instructions"