[task manager] saved object mappings include "text" fields that are probably not needed to be full text searchable

[pmuellr]

The following fields are typed text, but can probably be made keyword. I'm actually even wondering if we need to enable searching over them at all. I would be surprised if we ever searched over these in the runtime code, and it's not clear to me if it would be helpful to have them searchable for diagnostic reasons.

kibana/x-pack/plugins/task_manager/server/saved_objects/mappings.json

Lines 32 to 40 in edc5251

	"traceparent": {
	"type": "text"
	},
	"params": {
	"type": "text"
	},
	"state": {
	"type": "text"
	},

[elasticmachine]

Pinging @elastic/kibana-alerting-services (Team:Alerting Services)

[pmuellr]

Note that if we do change this to keyword, I also noticed these mappings do NOT have ignore_above set for the keyword types, which we absolutely must have, otherwise fields that exceed that length will cause create/update to error.

We should fix those in any case, unless for some reason they are no longer needed. Based on issue #100607, I think they are likely needed.

[pmuellr]

During the great "stop indexing every field in your SOs!" effort, we stopped indexing these fields altogether, and they are left in the mappings document as comments (as we do elsewhere).