[BUG]: Infer spectral models correctly

[echedey-ls]

• Closes Inferring spectral model returns 'first_solar' when not expected #2017
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Fix #2017 - note the approach may have been different. In this case, spectral inference has been deferred until weather is known, in order to take its available parameters for the inference.

Tested for script:

Code cleaned up from #2017

import pandas as pd
import pvlib


from pvlib.modelchain import ModelChain
from pvlib.location import Location
from pvlib.pvsystem import PVSystem
from pvlib.temperature import TEMPERATURE_MODEL_PARAMETERS


location = Location(
    latitude=40.30117520975112,
    longitude=-3.6973221576701967,
    tz="Europe/Madrid",
    altitude=660,
    name="Ormazabal Getafe",
)
modules = pvlib.pvsystem.retrieve_sam("CECMod")
inverters = pvlib.pvsystem.retrieve_sam("CECInverter")
module = modules["JA_Solar_JAP72S01_330_SC"]
inverter = inverters["SMA_America__STP_33_US_41__480V_"]
temp_par = TEMPERATURE_MODEL_PARAMETERS["sapm"]["open_rack_glass_glass"]
system = PVSystem(
    surface_tilt=19,
    surface_azimuth=170,
    module_parameters=module,
    inverter_parameters=inverter,
    temperature_model_parameters=temp_par,
    modules_per_string=17,
    strings_per_inverter=6,
)
modelchain = ModelChain(system, location, aoi_model="physical")

times = pd.date_range(
    start="2023-06-01", end="2023-12-15", freq="h", tz=location.tz
)
solar_position = location.get_solarposition(times)
clearsky = location.get_clearsky(times)

modelchain.run_model(clearsky)

Still haven't added tests, please let me know what you think about the behaviour first.

[cwhanse]

Maybe we're trying too hard to help. I'm inclined to default to the no_loss model if parameters are not found, regardless of Technology, Material or weather.

Or just do away with the inference altogether and set to no_loss if spectral_model=None

[echedey-ls]

Or just do away with the inference altogether and set to no_loss if spectral_model=None

I've defaulted to spectral_model="no_loss" and documented the infer_spectral_model as a helper function so the user can opt in to inference. I will write the tests now.
Nvm, it didn't work as many tests expect SAPM to be used whenever possible, so I've documented how it works when trying to infer without weather and that's it.

[echedey-ls]

L256 codecov warning in the diff is related to a PEP8 line change and the one in L910 is related to a different issue, #2259.