What should we add?

Right now the ConsolidateBlocks pass is written primarily in Rust but still has some dependency on Python. We need to have an implementation that doesn't rely on Python when being called from the C API and then add a standalone function to the C API as described in #14245 . The python dependency looks like it's around handling getting the unitary of custom python gates so we can strip that piece out when called from the C API to remove the python dependency.

Pre-requisites:

• Oxidize ParameterExpression #13267 (Optional)

Development:

• Hide Python dependency in ConsolidateBlocks #14748
• Decomposer extraction for Rust native ConsolidateBlocks #14776
• [WIP] C API: Burn ConsolidateBlocks #14751