docs: Add v1.12 release notes (#3845) (#3846)

* docs: Add v1.12 release notes

* Also add documentation in changelog

(cherry picked from commit 2d19e31)

Co-authored-by: Christian Simon <[email protected]>

Author: github-actions[bot]

docs/sources/release-notes/v1-12.md

@@ -0,0 +1,30 @@
+---
+title: Version 1.12 release notes
+menuTitle: V1.12
+description: Release notes for Grafana Pyroscope 1.12
+weight: 300
+---
+
+# Version 1.12 release notes
+
+The Pyroscope team is excited to present Grafana Pyroscope 1.12.
+
+This release contains enhancements, improves stability & performance.
+
+Notable changes are listed below. For more details, check out the [1.12.0 changelog](https://github.com/grafana/pyroscope/compare/v1.11.0...v1.12.0).
+
+## Enhancements
+
+* Added metadata label query capability in v2 ([#3749](https://github.com/grafana/pyroscope/pull/3749))
+* Implemented configurable symbols partitioning ([#3820](https://github.com/grafana/pyroscope/pull/3820))
+* S3 storage can now configure the  bucket-lookup-type ([#3788](https://github.com/grafana/pyroscope/pull/3788))
+
+## Fixes
+* String table access validation in distributor ([#3818](https://github.com/grafana/pyroscope/pull/3818))
+* Several OpenTelemetry (OTel) related fixes: ([#3795](https://github.com/grafana/pyroscope/pull/3795), [#3793](https://github.com/grafana/pyroscope/pull/3793), [#3794](https://github.com/grafana/pyroscope/pull/3794))
+* Config struct validation implementation ([#3837](https://github.com/grafana/pyroscope/pull/3837))
+* Expanded error logging to include 400 errors ([#3832](https://github.com/grafana/pyroscope/pull/3832))
+
+## Documentation
+* Restructure Pyroscope documentation and share content ([#3798](https://github.com/grafana/pyroscope/pull/3798))
+* Documentation fixes and example updates ([#3812](https://github.com/grafana/pyroscope/pull/3812), [#3806](https://github.com/grafana/pyroscope/pull/3806), [#3828](https://github.com/grafana/pyroscope/pull/3828), [#3809](https://github.com/grafana/pyroscope/pull/3809), [#3823](https://github.com/grafana/pyroscope/pull/3823))