[CREODIAS/AWS EOS/ASTRA_EOD] Downloads already existing product

[remi-braun]

When searching with creodias or aws_eos, Eodag does not seem to be able to determine that the product has already been downloaded by another provider.

It is due (I think) to the fact that these providers download files with a different name than the other providers:

• usual providers; S2A_MSIL1C_20191215T110441_N0208_R094_T30TXP_20191215T114155.SAFE (or .zip)
• earth_search : S2A_MSIL1C_20191215T110441_N0208_R094_T30TXP_20191215T114155 (but OK)
• creodias: S2A_MSIL1C_20191215T110441_N0208_R094_T30TXP_20191215T114155.SAFE.zip
• aws_eos: S2A_MSIL2A_20191215T110441____________T30TXP________________
• astra_eod: S2A_OPER_MSI_L2A_TL_MTI__20191215T122756_A023400_T30TXP_N02.13

Environment:

Python version: Python 3.7.12
EODAG version: eodag (Earth Observation Data Access Gateway): version 2.3.4

[sbrunato]

This is related to #251 and the discussion on products download directories.

• [ ] astraea_eod does not provide directly the SAFE formatted product ID. We should do like with aws_eos and build an incomplete ID (filled with _) but structured like a SAFE ID.
• [ ] when checking if a product has already been downloaded, we should compare folder names without including _ characters