Prometheus 3.2.0 release notes

[CHANGE] relabel: Replace actions can now use UTF-8 characters in targetLabel field. Note that $<chars> or ${<chars>} will be expanded. This also apply to replacement field for LabelMap action. #15851
[CHANGE] rulefmt: Rule names can use UTF-8 characters, except { and } characters (due to common mistake checks). #15851
[FEATURE] remote/otlp: Add feature flag otlp-deltatocumulative to support conversion from delta to cumulative. #15165
[ENHANCEMENT] openstack SD: Discover Octavia loadbalancers. #15539
[ENHANCEMENT] scrape: Add metadata for automatic metrics to WAL for metadata-wal-records feature. #15837
[ENHANCEMENT] promtool: Support linting of scrape interval, through lint option too-long-scrape-interval. #15719
[ENHANCEMENT] promtool: Add --ignore-unknown-fields option. #15706
[ENHANCEMENT] ui: Make "hide empty rules" and hide empty rules" persistent #15807
[ENHANCEMENT] web/api: Add a limit parameter to /query and /query_range. #15552
[ENHANCEMENT] api: Add fields Node and ServerTime to /status. #15784
[PERF] Scraping: defer computing labels for dropped targets until they are needed by the UI. #15261
[BUGFIX] remotewrite2: Fix invalid metadata bug for metrics without metadata. #15829
[BUGFIX] remotewrite2: Fix the unit field propagation. #15825
[BUGFIX] scrape: Fix WAL metadata for histograms and summaries. #15832
[BUGFIX] ui: Merge duplicate "Alerts page settings" sections. #15810
[BUGFIX] PromQL: Fix <aggr_over_time> functions with histograms. #15711