Exclude elastic_jvm_heap_memory from capacity planning

Sean McGivernrequested to merge
exclude-some-capacity-planning-things into master

This resource should not saturate completely: the JVM manages the heap size. If this saturates, then either:

  1. Something has gone terribly wrong with the JVM.
  2. We have misconfigured something.

Both of those will happen much quicker than a week, but we only run the capacity planning report once a week. We will still keep the component in the catalog, so saturation is visible on the regular dashboards.

For gitlab-com/gl-infra/scalability#1746.

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