[BUG] The name of the resulting expression file after running Biotea prepare affimetrix is wrong

[MrHedmad]

Describe the bug
The name of the resulting expression file after running Biotea prepare affimetrix is wrong: it's always expression_data.csv instead of what is passed to the command.

To Reproduce
Steps to reproduce the behavior:

1. Download some affymetrix .CEL files
2. Run biotea prepare affymetrix path/to/dir myname.csv
3. See that the resulting file is called expression_data.csv instead of myname.csv

Expected behavior
The output file should have the correct name.

Desktop (please complete the following information):

• OS: Arch Linux
• BioTEA Version (Run biotea info biotea): 2.0.0
• Docker engine version (Run docker --version): 28.1.1, build 4eba377327
• BioTEA container version (if applicable): 2.0.0