[Java] Add command line option parsing, i.e. allow passing Aeron Git coordinates
[Java] Add command line option parsing, i.e. allow passing Aeron Git coordinates

The configuration consists of two parameters:
- `--aeron-git-url` - sets the URL to clone from, defaults to `https://github.com/real-logic/aeron.git`
- `--aeron-git-tag` - sets the tag to checkout after clone, defaults to `origin/HEAD`

Example:
```bash
cppbuild/cppbuild --aeron-git-tag=1.27.0
```

real-logic/benchmarks,real-logic/benchmarks,real-logic/benchmarks