Mekko for district heating HT, MT, LT (#4380)

* Mekko for HT heat network

* Locales

* Queries added in etmodel

* Mekko for MT network

* Demand side collective heat mekko MT

* Adding queries for heat mekko (MT) in etmodel

* Mekkos heat networks

* Changing labels queries heat mekko

* Locales

* Changing labels queries heat mekko (MT)

* Changing colors heat mekko

* Chart titles

* Changing order of queries in HT - and update labels and colors in LT

* Changing order of queries in MT and LT

* Locales

* Updated colours

* Chart description

* Documentation link in chart description

* Update labels

* Update queries heat network in report

* Remove obsolete collective heat mekko including locales

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Co-authored-by: claudiavalkenier <[email protected]>