chore: generic error message for file load

[staaldraad]

What kind of change does this PR introduce?

Bug fix

What is the current behavior?

When loading a wasm file (from the local filesystem), the error message could be used to enumerate files on the filesystem.

File exists - /etc/passwd

wrappers=# select * from wasm_out;
ERROR:  wasmtime error: failed to parse WebAssembly module

No such file - /etc/nop

wrappers=# select * from wasm_out;
ERROR:  wasmtime error: failed to read input file: /etc/nop

What is the new behavior?

Gives a generic error message for file load failures to prevent file system enumeration.

File exists - /etc/passwd

wrappers=# select * from wasm_out;
ERROR:  wasmtime error: failed to parse WebAssembly module

No such file - /etc/nop

wrappers=# select * from wasm_out;
ERROR:  wasmtime error: failed to parse WebAssembly module

Additional context

Add any other context or screenshots.

[burmecia]

Thanks for the PR! I've made the error specific for the Wasm component load failure, so its error message won't leak filesystem info.