Include zstd encoding in IO fuzzer (#5661)

Closes #5658, #5656, #5629, #5614.

Signed-off-by: Adam Gutglick <[email protected]>

Author: AdamGS

fuzz/Cargo.toml

@@ -19,9 +19,9 @@ cargo-fuzz = true
 
 [features]
 default = ["native"]
-native = ["libfuzzer-sys", "zstd", "vortex-file"]
+native = ["libfuzzer-sys", "zstd", "vortex-file", "vortex/files"]
 wasmfuzz = []
-zstd = ["vortex-layout/zstd"]
+zstd = ["vortex/zstd"]
 
 [dependencies]
 # Always needed - arbitrary is used for input generation