Clarify integer settings for repository-s3 repos (elastic#114152)

Today there are a handful of integer settings for `repository-s3`
repositories whose docs link to the page about numeric field types. Yet
these settings are not fields, and do not support floating-point values
either. The convention throughout the rest of the docs is to just call
these things `integer` without linking to anything. This commit aligns
the `repository-s3` docs with this convention.

Backport of elastic#114093 to `8.15`

Author: DaveCTurner

docs/reference/snapshot-restore/repository-s3.asciidoc

@@ -311,11 +311,8 @@ include::repository-shared-settings.asciidoc[]
 
 `delete_objects_max_size`::
 
-    (<<number,numeric>>) Sets the maxmimum batch size, betewen 1 and 1000, used
-    for `DeleteObjects` requests. Defaults to 1000 which is the maximum number
-    supported by the
-    https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteObjects.html[AWS
-    DeleteObjects API].
+    (integer) Sets the maxmimum batch size, betewen 1 and 1000, used for `DeleteObjects` requests. Defaults to 1000 which is the maximum
+    number supported by the https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteObjects.html[AWS DeleteObjects API].
 
 NOTE: The option of defining client settings in the repository settings as
 documented below is considered deprecated, and will be removed in a future