installing using pgxman dependency unmet dependency postgresql-$ver-jit-llvm

### What happens?

This jit-llvm package does't exists, so unmet dependency there.

### To Reproduce

```
apt install postgresql-16-pgxman-pg-duckdb
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
postgresql-16-pgxman-pg-duckdb : Depends: postgresql-16-jit-llvm (>= 15)
E: Unable to correct problems, you have held broken packages.
```

### OS:

Ubuntu 22.04

### pg_duckdb Version (if built from source use commit hash):

0.3.1

### Postgres Version (if built from source use commit hash):

16.6

### Hardware:

_No response_

### Full Name:

Isaias Sanchez

### Affiliation:

Utiq SA

### What is the latest build you tested with? If possible, we recommend testing with the latest nightly build.

I have tested with a stable release

### Did you include all relevant data sets for reproducing the issue?

No - Other reason (please specify in the issue body)

### Did you include all code required to reproduce the issue?

- [x] Yes, I have

### Did you include all relevant configuration (e.g., CPU architecture, Linux distribution) to reproduce the issue?

- [x] Yes, I have

Start by reproducing the apt install command on Ubuntu 22.04 with PostgreSQL 16.6, then inspect the package metadata for postgresql-16-pgxman-pg-duckdb and its dependency declarations. Done means the package can be installed without requesting the unavailable postgresql-16-jit-llvm dependency.

Written by the indexing model from the issue text.