Update headings and details in release notes and feature docs

Revised section titles to align with terminologies ("Data Service" and "Query Service") and improved clarity of information in release notes and new features for version 8.0.0. Added explanation for warmup behavior enhancements in the Data Service.

*Note: The AsciiDoc for MB-9418 is a tad fragile, as it uses the open block to format the list. This should probably be replaced when AsciiDoc is updated to use the new open block syntax (~~~~).

Author: RayOffiah

modules/introduction/partials/new-features-80.adoc

@@ -27,6 +27,25 @@ The `/pools/default/nodeServices` endpoint results now include the UUID and name
 [#section-new-feature-data-service]
 === Data Service
 
+
+https://jira.issues.couchbase.com/browse/MB-9418[MB-9418]::
+The previous warmup behavior was to load values and not complete warmup until the Bucket reaches one of:
++
+--
+* `warmup_min_memory_threshold` — defaults to 100%.
+* `warmup_min_items_threshold` — defaults to 100%.
+* The bucket low watermark (i.e., 75% of the Bucket quota)
+--
++
+This could take considerable time, and during the warmup process, 
+the bucket is unavailable to the nodes. + 
++
+*Resolution:* Couchbase Server will now continue to page in items, even after the `warmup_min_items_threshold` has been reached.
+Therefore, if the `warmup_min_items_threshold` is set to 10%,
+then only 10% of the data items would need to be paged in before the warmup is flagged as complete.
+For larger data sets, the bucket will be available in a faster time frame,
+while the server will still make use of available memory.
+
 https://jira.issues.couchbase.com/browse/MB-64071[MB-64071]::
 Couchbase Server has a new metric
 tracking the version information from a user agent character string connected to the data service.
@@ -55,8 +74,8 @@ Additional information sent by clients at connection time can be found in the lo
 https://jira.issues.couchbase.com/browse/MB-61048[MB-61048]::
 Once faulty remote cluster credentials are fixed, XDCR will now be able to more quickly restart replications that depend on the repaired references.
 
-[#section-new-feature-800-query-engine]
-=== Query Engine
+[#section-new-feature-800-query-service]
+=== Query Service
 
 https://jira.issues.couchbase.com/browse/MB-63459[MB-63459]::
 New to `8.0.0` is the ability to manipulate document extended attributes (xattrs) via a common SQL++ statement.

modules/release-notes/partials/docs-server-8.0.0-release-note.adoc

@@ -10,8 +10,8 @@ For detailed information on new features and enhancements, please see xref:intro
 
 This release contains the following fixes:
 
-[#section-fixed-issues-800-storage]
-==== Storage
+[#section-fixed-issues-800-data-service]
+==== Data Service
 
 https://jira.issues.couchbase.com/browse/MB-55290[MB-55290]::
 During the resizing of a HashTable in a vBucket's document cache,
@@ -26,8 +26,6 @@ https://jira.issues.couchbase.com/browse/MB-62647[MB-62647]::
 +
 *Resolution:* The values are now correctly remapped to be in the 0–1 range.
 
-[#section-fixed-issues-800-data-service]
-==== Data Service
 
 https://jira.issues.couchbase.com/browse/MB-63946[MB-63946]::
 When using `mcstat` it is no longer possible to use `--json=pretty`.