document available resources

[boegel]

• AWS (@terjekv, @zilverberg, @bedroge, @boegel, @kniec)
• Fenix (@zilverberg)
• OSU OSL for POWER9 (@bedroge)

[ocaisa]

We have 4.6M core hours on the scalable partition of JUSUF until the end of the year...but no GPU resources there.