[v2.14.0] ``recipe_weathertyping_CMIP6.yml`` fails due to missing data

[schlunma]

See https://esmvaltool.dkrz.de/shared/esmvaltool/v2.14.0/recipe_weathertyping_CMIP6_20260302_160003/run/main_log_debug.txt.

[flicj191]

Summary of missing data during testing on Gadi for v2.15.0

 ERROR   Could not create all tasks
 ERROR   Missing data for preprocessor weathertyping/eobs_pr_wt:
- Missing data for Dataset: pr, day, OBS, E-OBS, day, v29.0e-0.25  # have v20 which currently matches the CMORiser
 ERROR   Missing data for preprocessor weathertyping/era5_msl_mean:
- No input data available for years 1958-1978 in files:
..Tier3/ERA5/OBS6_ERA5_reanaly_1_day_psl_..
 ERROR   Missing data for preprocessor weathertyping/era5_tp_mean:
- No input data available for years 1958-1965 in files:
../Tier3/ERA5/OBS6_ERA5_reanaly_1_day_pr_..
 ERROR   Missing data for preprocessor weathertyping/era5_tas_mean:
- No input data available for years 1958-1979 in files:
..Tier3/ERA5/OBS6_ERA5_reanaly_1_day_tas_..