[DOCS] Updates pull and issue release attributes (#58348)

Author: lcawl

dev-tools/es_release_notes.pl

@@ -118,14 +118,14 @@ sub dump_issues {
                 }
                 my $number = $issue->{number};
 
-                print encode_utf8("* $title {pull}${number}[#${number}]");
+                print encode_utf8("* $title {es-pull}${number}[#${number}]");
 
                 if ( my $related = $issue->{related_issues} ) {
                     my %uniq = map { $_ => 1 } @$related;
                     print keys %uniq > 1
                         ? " (issues: "
                         : " (issue: ";
-                    print join ", ", map {"{issue}${_}[#${_}]"}
+                    print join ", ", map {"{es-issue}${_}[#${_}]"}
                         sort keys %uniq;
                     print ")";
                 }

docs/Versions.asciidoc

@@ -7,11 +7,6 @@ include::{asciidoc-dir}/../../shared/versions/stack/{source_branch}.asciidoc[]
 :jdk_major:             8
 :build_flavor:          default
 
-:issue:           https://github.com/elastic/elasticsearch/issues/
-:ml-issue:        https://github.com/elastic/ml-cpp/issues/
-:pull:            https://github.com/elastic/elasticsearch/pull/
-:ml-pull:         https://github.com/elastic/ml-cpp/pull/
-
 :docker-repo:     docker.elastic.co/elasticsearch/elasticsearch
 :docker-image:    {docker-repo}:{version}
 :plugin_url:      https://artifacts.elastic.co/downloads/elasticsearch-plugins

docs/reference/migration/migrate_6_3.asciidoc

@@ -54,7 +54,7 @@ IMPORTANT: If you upgraded to 6.3, your old security configuration files still
 exist in an `x-pack` folder. That path is deprecated, however, and you should 
 move your files out of that folder. There is a known problem where the files in 
 the old path are disregarded in favor of the files in the new path: 
-{pull}/33688[#33688]. For more information, see 
+{es-pull}/33688[#33688]. For more information, see 
 <<trb-security-path>>.
 
 Settings such as `files.role_mapping` now default to