ci(release): Switch from action-prepare-release to Craft (#106005)

## Summary

This PR migrates from the deprecated `action-prepare-release` to the new
Craft GitHub Actions.

## Changes

- Migrated `.github/workflows/release.yml` to Craft reusable workflow
- Updated `.craft.yml` with `versioning.policy: calver`

## Documentation

See https://getsentry.github.io/craft/github-actions/ for more
information.

---------

Co-authored-by: getsantry[bot] <66042841+getsantry[bot]@users.noreply.github.com>

Author: BYK

.craft.yml

@@ -1,7 +1,8 @@
-minVersion: '0.23.1'
+minVersion: '2.20.0'
 releaseBranchPrefix: releases
-changelog: CHANGES
-changelogPolicy: auto
+changelog:
+  filePath: CHANGES
+  policy: auto
 statusProvider:
   name: github
   config:
@@ -13,3 +14,5 @@ artifactProvider:
   name: none
 targets:
   - name: github
+versioning:
+  policy: calver

.github/workflows/changelog-preview.yml

@@ -0,0 +1,19 @@
+name: Changelog Preview
+on:
+  pull_request_target:
+    types:
+      - opened
+      - synchronize
+      - reopened
+      - edited
+      - labeled
+      - unlabeled
+permissions:
+  contents: write
+  pull-requests: write
+  statuses: write
+
+jobs:
+  changelog-preview:
+    uses: getsentry/craft/.github/workflows/changelog-preview.yml@v2
+    secrets: inherit

.github/workflows/release.yml

@@ -3,7 +3,7 @@ on:
   workflow_dispatch:
     inputs:
       version:
-        description: Version to release (optional)
+        description: Version to release (or "auto")
         required: false
       force:
         description: Force a release even when there are release-blockers (optional)
@@ -12,6 +12,10 @@ on:
     # We want the release to be at 9-10am Pacific Time
     # We also want it to be 1 hour before the self-hosted release
     - cron: '0 17 15 * *'
+permissions:
+  contents: write
+  pull-requests: write
+
 jobs:
   release:
     runs-on: ubuntu-latest
@@ -28,7 +32,7 @@ jobs:
           token: ${{ steps.token.outputs.token }}
           fetch-depth: 0
       - name: Prepare release
-        uses: getsentry/action-prepare-release@d2cc2db3db92bc5b79a90c316f588f2b13626a2b # v1.5.6
+        uses: getsentry/craft@beea4aba589c66381258cbd131c5551ae8245b82 # v2
         env:
           GITHUB_TOKEN: ${{ steps.token.outputs.token }}
         with: