Update DEA technology data for energy storage (#202)

* update technology data for energy storage xlsx and costs.csv, add storage temperatures for tes and change gas storage to order_data and delete add_gas_storage, since the format of xlsx version 9 changed for gas storage

* correct currency years csv

* small updates

* update correct processing of investment costs and efficiency PTES

* solved wring investment calculation of charger and discharger for gas storage charger/discharger

* commit US cost

* improve documentation

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* update test script, since gas_storage isnt retrieved by own function anymore

* update test compile cost assumptions file

* fix wrong unit of FOM for pit thermal energy storage

* trigger CI

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* update US costs

* resolve test_helpers

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Amos Schledorn <60692940+amos-schledorn@users.noreply.github.com>

Author: 3 people

docs/release_notes.rst

@@ -20,6 +20,12 @@ Upcoming Release
 ..   The features listed below are not released yet, but will be part of the next release! 
 ..   To use the features already you have to use the ``master`` branch.
 
+* Updated DEA Energy Storage data file (technology_data_catalogue_for_energy_storage.xlsx) to the newest version 9 – costs are now given in 2020 currency year.
+
+* Added storage temperatures as a parameter for central and decentral water tanks as well as for pit thermal energy storage.
+
+* Integrated gas storage processing directly into the order_data function and removed the add_gas_storage function, as its data structure now matches that of the other components in the technology_data_catalogue_for_energy_storage.xlsx file.
+
 * Include unit test for compile_cost_assumptions_usa.py (https://github.com/PyPSA/technology-data/pull/170)
 
 * US specific folder for NREL/ATB data (https://github.com/PyPSA/technology-data/pull/172)