[ES|QL] Update function metadata (elastic#230354)

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/scalar_functions.tsx

@@ -1297,7 +1297,7 @@ export const functions = {
           markdownContent={i18n.translate('languageDocumentation.documentationESQL.md5.markdown', {
             defaultMessage: `
   ### MD5
-  Computes the MD5 hash of the input.
+  Computes the MD5 hash of the input (if the MD5 hash is available on the JVM).
 
   \`\`\`esql
   FROM sample_data

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

@@ -80,11 +80,6 @@ export const commandsMetadata: Record<string, unknown> = {
     type: 'command',
     name: 'rerank',
   },
-  rrf: {
-    type: 'command',
-    name: 'rrf',
-    license: 'ENTERPRISE',
-  },
   sample: {
     type: 'command',
     name: 'sample',