In evergreen_develop.yml we defined a performance test template that is used by both our ARM and x86 variants. However when defining many-collections we override the host to always run on ubuntu2004-wt-large.
This applies to both of our variants and means we aren't reporting ARM performance results to the ARM performance charts.

We originally did this because the default host was too small to run many-collections, so when we remove the `distros: ubuntu2004-wt-large` override we need to make sure the test still runs on a sufficiently large host for both the ARM and x86 variant.

This will affect the reported perf stats for the test, so when you merge please let us know in the #storage-perf-barons channel so we can flag it as an expected changepoint.