[9.0] (backport #10184) [docs] Refine Markdown release notes structure (#10245)

* [docs] Refine Markdown release notes structure (#10184)

* break out minor versions

* rename breaking.md to breaking-changes.md

(cherry picked from commit 9b565cd)

# Conflicts:
#	docs/release-notes/_snippets/9.1.0/breaking-changes.md
#	docs/release-notes/_snippets/9.1.1/breaking-changes.md
#	docs/release-notes/_snippets/9.1.2/breaking-changes.md
#	docs/release-notes/_snippets/9.1.3/breaking-changes.md
#	docs/release-notes/_snippets/9.1.4/breaking-changes.md
#	docs/release-notes/_snippets/breaking-changes.md
#	docs/release-notes/_snippets/deprecations.md
#	docs/release-notes/_snippets/index.md

* fix conflicts

---------

Co-authored-by: Colleen McGinnis <[email protected]>

Author: mergify[bot]

docs/release-notes/_snippets/9.0.0/breaking.md renamed to docs/release-notes/_snippets/9.0.0/breaking-changes.md

@@ -1,23 +1,2 @@
-:::{include} /release-notes/_snippets/9.0.7/breaking.md
-:::
-
-:::{include} /release-notes/_snippets/9.0.6/breaking.md
-:::
-
-:::{include} /release-notes/_snippets/9.0.5/breaking.md
-:::
-
-:::{include} /release-notes/_snippets/9.0.4/breaking.md
-:::
-
-:::{include} /release-notes/_snippets/9.0.3/breaking.md
-:::
-
-:::{include} /release-notes/_snippets/9.0.2/breaking.md
-:::
-
-:::{include} /release-notes/_snippets/9.0.1/breaking.md
-:::
-
-:::{include} /release-notes/_snippets/9.0.0/breaking.md
+:::{include} /release-notes/_snippets/breaking-changes/9.0.md
 :::

docs/release-notes/_snippets/9.0.1/breaking.md renamed to docs/release-notes/_snippets/9.0.1/breaking-changes.md

@@ -0,0 +1,23 @@
+:::{include} /release-notes/_snippets/9.0.7/breaking-changes.md
+:::
+
+:::{include} /release-notes/_snippets/9.0.6/breaking-changes.md
+:::
+
+:::{include} /release-notes/_snippets/9.0.5/breaking-changes.md
+:::
+
+:::{include} /release-notes/_snippets/9.0.4/breaking-changes.md
+:::
+
+:::{include} /release-notes/_snippets/9.0.3/breaking-changes.md
+:::
+
+:::{include} /release-notes/_snippets/9.0.2/breaking-changes.md
+:::
+
+:::{include} /release-notes/_snippets/9.0.1/breaking-changes.md
+:::
+
+:::{include} /release-notes/_snippets/9.0.0/breaking-changes.md
+:::