[projections] add AnomalyTemperatureTemporalCovariate and test. and anomaly computation for cmip5 global temperatures

[projections] in an adamont_studies.py study can have different year_min and year max. Refactor adamont_gcm_rcm_couples.py. Add rcp_extended 2.6 et 4.5. Fix erroneous data for some couple for the scenario 8.5. Add main_data.py.

[projections] add plot global temp. also centered the global temp on the winter year. and average on the past 30 years

[projections] add test_massif_names_adamont_v2 to check that all massifs are the same than for SAFRAN 2020.
add assertion to check to the year_min and year_max for each scenario.
compute bias in the mean maxima at the masssif level

generalize the usage of "get_gcm_rcm_couple_adamont_to_full_name". fix color_dict.

[snow projection] improve rank & bias plots. remove dataset attribute for abstract_adamont_study.py.

add altitude argument to adamont studies. refactor a bit. add time series display for adamont series