Add overlay for deep objects in ML analysis_config, datafeed_config, and transform source

[lcawl]

This PR adds overlays that address the following errors that appear when deploying documents in Bump.sh:

“09:13:35 PM Rendering of the API documentation will be limited to a max depth of 11.”
...
09:13:35 PM Ml > Create an anomaly detection job > Request Body (application/json); datafeed_config.query.span_containing...; has 28 hidden branches, e.g.; datafeed_config.query.span_containing.span_field_masking
...
09:13:35 PM Ml > Create an anomaly detection job > Request Body (application/json); analysis_config.categorization_analyzer.{_types:CategorizationAnalyzerDefinition}...; has 80 hidden branches, e.g.; analysis_config.categorization_analyzer.{_types:CategorizationAnalyzerDefinition}.tokenizer
...
09:13:35 PM Ml > Create a data frame analytics job > Request Body (application/json); source.query.span_containing...; has 28 hidden branches, e.g.; source.query.span_containing.span_field_masking
...
09:13:35 PM Transform > Get transforms > Response (200); transforms[].source.query...; has 172 hidden branches, e.g.; transforms[].source.query.bool

For now I've overlaid:

• the entire query object within the ml._types:Datafeed, ml._types:DataframeAnalyticsSource, and transform._types:Source schema objects
• the entire tokenizer object within ml._types:CategorizationAnalyzerDefinition

I've replaced them with descriptions that match what we had in https://www.elastic.co/guide/en/elasticsearch/reference/current/ml-put-job.html , https://www.elastic.co/guide/en/elasticsearch/reference/current/put-dfanalytics.html, and https://www.elastic.co/guide/en/elasticsearch/reference/current/put-transform.html. However, we could potentially overlay only the a subset of objects deeper within _types.query_dsl:QueryContainer and _types.analysis:Tokenizer, depending on further analysis of where they're re-used.

I've also added an x-abbreviated: true property so that we can have an indicator of where the abbreviation occurs.

Before

...
      "ml._types:Datafeed": {
        "type": "object",
        "properties": {
          "query": {
            "$ref": "#/components/schemas/_types.query_dsl:QueryContainer"
          },
...
      "ml._types:DataframeAnalyticsSource": {
        "type": "object",
        "properties": {
          "query": {
            "$ref": "#/components/schemas/_types.query_dsl:QueryContainer"
          },
...
      "transform._types:Source": {
        "type": "object",
        "properties": {
          "query": {
            "$ref": "#/components/schemas/_types.query_dsl:QueryContainer"
          },
...
      "ml._types:CategorizationAnalyzerDefinition": {
        "type": "object",
        "properties": {
          "tokenizer": {
            "$ref": "#/components/schemas/_types.analysis:Tokenizer"
          }

After

      "ml._types:Datafeed": {
        "type": "object",
        "properties": {
          "query": {
            "x-abbreviated": true,
            "type": "object",
            "description": "The Elasticsearch query domain-specific language (DSL). This value corresponds to the query object in an Elasticsearch search POST body. All the options that are supported by Elasticsearch can be used, as this object is passed verbatim to Elasticsearch. By default, this property has the following value: `{\"match_all\": {\"boost\": 1}}`.\n",
            "externalDocs": {
              "url": "https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl.html",
              "description": "Query DSL"
            }
          }
...
      "ml._types:DataframeAnalyticsSource": {
        "type": "object",
        "properties": {
          "query": {
            "x-abbreviated": true,
            "type": "object",
            "description": "The Elasticsearch query domain-specific language (DSL). This value corresponds to the query object in an Elasticsearch search POST body. All the options that are supported by Elasticsearch can be used, as this object is passed verbatim to Elasticsearch. By default, this property has the following value: `{\"match_all\": {}}`.\n",
            "externalDocs": {
              "url": "https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl.html",
              "description": "Query DSL"
            }
          }
...
      "transform._types:Source": {
        "type": "object",
        "properties": {
          "query": {
            "x-abbreviated": true,
            "type": "object",
            "description": "A query clause that retrieves a subset of data from the source index.\n",
            "externalDocs": {
              "url": "https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl.html",
              "description": "Query DSL"
            }
          }
...
      "ml._types:CategorizationAnalyzerDefinition": {
        "type": "object",
        "properties": {
           "tokenizer": {
            "x-abbreviated": true,
            "oneOf": [
              {
                "type": "object"
              },
              {
                "type": "string"
              }
            ],
            "description": "The name or definition of the tokenizer to use after character filters are applied. ...",
            "externalDocs": {
              "url": "https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-tokenizers.html",
              "description": "Tokenizer reference"
            }
          }

[szabosteve]

I left some minor suggestions, otherwise LGTM!