[DOC-11285] Add deprecations and backward-incompatible changes for v2…

…4.3 (#19054)

* [DOC-11285] Add deprecations and backward-incompatible changes for v24.3

This commit adds two includes, which should be included in the v24.3.0 GA notes.
We should monitor the remaining betas and RC to catch any new ones

src/current/_includes/releases/v24.3/backward-incompatible.md

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+Before [upgrading to CockroachDB v24.3]({% link v24.3/upgrade-cockroach-version.md %}), be sure to review the following backward-incompatible changes, as well as [key cluster setting changes](#v24-3-0-cluster-settings), and adjust your deployment as necessary.
+
+If you plan to upgrade to v24.3 directly from v24.1 and skip v24.2, be sure to also review the [v24.2 release notes]({% link releases/v24.2.md %}) for backward-incompatible changes from v24.1.
+
+- Upgrading to v24.3 is blocked if no [license]({% link v24.3/licensing-faqs.md %}) is installed, or if a trial/free license is installed with telemetry disabled. [#130576][#130576]
+
+[#130576]: https://github.com/cockroachdb/cockroach/pull/130576
+
+{% comment %}Remove this anchor when it is added to the v24.3.0 GA release notes{% endcomment %}
+<a id="v24-3-0-cluster-settings"></a>

src/current/_includes/releases/v24.3/deprecations.md

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+The following deprecations are announced in v24.3. If you plan to upgrade to v24.3 directly from v24.1 and skip v24.2, be sure to also review the [v24.2 release notes]({% link releases/v24.2.md %}) for deprecations.
+
+- The session variable [`enforce_home_region_follower_reads_enabled`]({% link v24.3/session-variables.md %}#enforce-home-region-follower-reads-enabled) is now deprecated, and will be removed in a future release. The related session variable [`enforce_home_region`]({% link v24.3/session-variables.md %}#enforce-home-region) is **not** deprecated. [#129024][#129024]
+
+[#129024]: https://github.com/cockroachdb/cockroach/pull/129024