pkg/elasticsearch: Replace hand-written models with Elasticsearch Go typed client

[marclop]

Description

Instead of using the hand-written types in

apm-tools/pkg/espoll/query.go

Lines 22 to 41 in cf0430e

	type BoolQuery struct {
	Filter []any
	Must []any
	MustNot []any
	Should []any
	MinimumShouldMatch int
	Boost float64
	}
	func (q BoolQuery) MarshalJSON() ([]byte, error) {
	type boolQuery struct {
	Filter []any `json:"filter,omitempty"`
	Must []any `json:"must,omitempty"`
	MustNot []any `json:"must_not,omitempty"`
	Should []any `json:"should,omitempty"`
	MinimumShouldMatch int `json:"minimum_should_match,omitempty"`
	Boost float64 `json:"boost,omitempty"`
	}
	return encodeQueryJSON("bool", boolQuery(q))
	}

. It would be better if we used the new Elasticsearch Go Typed client.