v0.25.14: rename Drive raw-read API to remove third-party project breadcrumbs

Pure rename pass — no behavioral change:
- Drive::is_libredrive_active() → Drive::is_raw_read_active()
- PlatformDriver::is_libredrive_active() trait method (same rename)
- Mt1959 struct field libredrive_active → raw_read_active
- Error::AacsLibredriveUnsupported → Error::AacsRawReadUnsupported
  (numeric code E7016 unchanged)
- All callers, tests, and doc comments updated to the new name.

Old identifiers removed entirely; downstream consumers must update.
Mirrored in bdemu, freemkv, autorip, freemkv-tools.

src/aacs/keys.rs

@@ -858,7 +858,7 @@ fn resolve_keys_classical(ctx: &ResolveContext<'_>, version: AacsVersion) -> Opt
     }
 
     // Paths 2-4 all consume the Volume ID. Without it (handshake
-    // skipped, libredrive bypass failed, etc.) every downstream
+    // skipped, raw-read bypass failed, etc.) every downstream
     // derivation produces garbage. Caller stamps `[0u8; 16]` as the
     // sentinel "no VID" — short-circuit here so we don't surface a
     // misleading "all paths failed" log when really the math is