ebpf_hash_table should initialize ebpf_random if needed

### Describe the feature you'd like supported

Currently, use of ebpf_hash_table requires ebpf_random to be initialized.

### Proposed solution

ebpf_hash_table should check if random has been initialized and then initialize it if not.

### Additional context

_No response_

Start by locating the ebpf_hash_table implementation and the initialization path for ebpf_random. Confirm how callers currently depend on prior random initialization, then make the table operation initialize randomness when needed and verify that both initialized and uninitialized cases behave correctly.

Written by the indexing model from the issue text.