Allow XML initialization for optical connection

Refactored the configuration pipeline to improve clarity, consistency, and robustness in RD53 chip handling.

Changes with copy_ph2_acf_files

• Updated search_rd53_key to recursively detect all RD53 flavour keys and validate their consistency. Raises an error if multiple types are found.
• Improved update_rd53 to ensure the correct replacement of RD53Bv1 with RD53Bv2 when required. Added proper error handling for missing or malformed XML structures.
• Added uncomment_lpGBT_section_if_optical
• Cleaned up get_files to better handle hybrid/chip structures, preserve default NTC settings, and support clean XML formatting.
• Added validation to prevent ambiguous RD53 configurations.

These changes make the system more robust against malformed inputs and more maintainable going forward. It supports both electrical and optical configurations. The following configurations are allowed:

# for optical connection
config_dict = {
  "OpticalGroup":{
    "X": { # id
      "FMCId" : "L12" # optional
      "lpGBT" : {"version": 1, "ChipAddress": "0x70"} # required
      "Hybrid": {
        "0": {...} # should only have one instance
    } 
  }
}

# for electrical connection
config_dict = {
  "OpticalGroup":{
    "X": { # id
      "FMCId" : "L12" # optional
      "Hybrid": {
        "0": {...}, # multiple instances are allowed
        "1": {...},
        ...
    } # must not have any lpGBT configuration
  }
}

# for electrical conneciton, simplified configuration without optical group
hybrid_dict = { 
      "Hybrid": {
        "0": {...},
        "1": {...},
        ...
}

Add a loop over the optical group.