[ES|QL] Update function metadata (elastic#267376)

This PR updates the function definitions and inline docs based on the
latest metadata from Elasticsearch.

Author: kibanamachine

src/platform/packages/private/kbn-language-documentation/src/sections/generated/aggregation_functions.tsx

@@ -459,6 +459,33 @@ export const functions = {
       },
     },
     // Do not edit manually... automatically generated by scripts/generate_esql_docs.ts
+    {
+      label: i18n.translate('languageDocumentation.documentationESQL.sparkline', {
+        defaultMessage: 'SPARKLINE',
+      }),
+      preview: true,
+      license: undefined,
+      description: {
+        markdownContent: i18n.translate(
+          'languageDocumentation.documentationESQL.sparkline.markdown',
+          {
+            defaultMessage: `
+  ### SPARKLINE
+  The values representing the y-axis values of a sparkline graph for a given aggregation over a period of time.
+
+  \`\`\`esql
+  FROM employees
+  | STATS sparkline = SPARKLINE(COUNT(*), hire_date, 20, "1985-01-01T00:00:00Z", "1985-12-31T00:00:00Z")
+  \`\`\`
+  `,
+            description:
+              'Text is in markdown. Do not translate function names, special characters, or field names like sum(bytes)',
+            ignoreTag: true,
+          }
+        ),
+      },
+    },
+    // Do not edit manually... automatically generated by scripts/generate_esql_docs.ts
     {
       label: i18n.translate('languageDocumentation.documentationESQL.st_centroid_agg', {
         defaultMessage: 'ST_CENTROID_AGG',

src/platform/packages/shared/kbn-esql-language/src/commands/definitions/generated/aggregation_functions.ts

@@ -4241,7 +4241,6 @@ const sparklineDefinition: FunctionDefinition = {
     defaultMessage:
       'The values representing the y-axis values of a sparkline graph for a given aggregation over a period of time.',
   }),
-  ignoreAsSuggestion: true,
   preview: true,
   alias: undefined,
   signatures: [