Unify ebpf_execution_type_t and ebpf_code_type_t into one enum.

### Describe the feature you'd like supported

Currently there are 2 enums: `ebpf_execution_type_t` and `ebpf_code_type_t`, one in user mode and one in EC.
They should be ideally merged into 1 enum.

The proposed solution is in this discussion:
https://github.com/microsoft/ebpf-for-windows/pull/811#discussion_r836641519

### Proposed solution

The proposed solution is in this discussion:
https://github.com/microsoft/ebpf-for-windows/pull/811#discussion_r836641519

### Additional context

_No response_

Start by reading the definitions and uses of ebpf_execution_type_t and ebpf_code_type_t in the user-mode and EC portions of the repository. Review the proposed solution in the linked discussion on pull request #811, then trace callers and related tests to identify the compatibility impact. Done means the two enums are represented consistently without breaking user-mode or EC behavior.

Written by the indexing model from the issue text.