Normalize JSON when doing comparison for mappings, etc.

[subsetpark]

Here's a TF plan that I'm currently getting:

  # module.es-prod-22-search.elasticsearch_index.block[1] must be replaced
-/+ resource "elasticsearch_index" "block" {
     ...
      ~ id                                     = "block-deleted-1" -> (known after apply)
      ~ mappings                               = jsonencode( # whitespace changes force replacement
            {
                _routing   = {
                    required = true
                }
...

That is, it suggests that even though the json value of my index mappings hasn't changed at all, the whitespace that I input is not identical to the whitespace in the ES cluster.

I've done some googling about this, and most reports seem to say something like "it's the responsibility of the provider" to ignore whitespace when comparing to the value on the state.

Some citations:

• https://stackoverflow.com/questions/74700633/terraform-is-there-a-way-to-ignore-whitepace-changes-when-generating-a-plan
• https://github.com/hashicorp/terraform/issues/23928

Is this somethat that can be fixed in this provider? Because of this spurious change, we're not able to make any live changes to our cluster.