release: v0.40.0 required reviews

[materialize-bot]

The following PRs in v0.40.0 require review:

• #17063 ci: Remove mentions of Postgres in CI steps that use Cockroach (@philip-stoev)
• #17065 cloudtest: Call the Postgres server 'postgres' rather than 'postgres-… (@philip-stoev)
• #17090 testdrive: Do not run linked-clusters.td with more than 1 replica (@philip-stoev)
• #17092 feature-benchmark: Allow running individual scenarios (@philip-stoev)
• #17120 test/upgrade: fix cluster replica sizing (@benesch)
• #16936 doc/user: document mz_dependencies (@guswynn)
• #17045 test/upgrade: use standalone CockroachDB (@benesch)
• #17162 materialized: move embedded CockroachDB store to mzdata directory (@benesch)
• #17173 doc/user: wrap up #17141 (@morsapaes)

The following commits in this release were not associated with any PR and therefore require review:

• 7ef011613 LICENSE: update change date (@Materializer)
• d3f0a971c LICENSE: update change date (@Materializer)
• 90f8e070e LICENSE: update change date (@Materializer)
• fbcb1d463 LICENSE: update change date (@Materializer)
• ad06bd5da LICENSE: update change date (@Materializer)
• 9178e16f5 doc/developer: document the existence of CODEOWNERS (@benesch)
• 13271a287 LICENSE: update change date (@Materializer)
• 8abdc9e7f LICENSE: update change date (@Materializer)
• c73d5f696 sql: remove qgm_optimizations from OptimizerConfig (@aalexandrov)
• f285d2d5f sql: remove qgm_optimizations from PlanContext (@aalexandrov)
• 047ab2e6f adapter: remove qgm_optimizations session variable (@aalexandrov)
• 8d6ad365d sql: remove ExplainStage::(Optimized)QueryGraph (@aalexandrov)
• 6852884d0 sql: remove QGM code and tests (@aalexandrov)
• bd18e2bbe doc/developer: remove comment from 101 the Query Compilation 101 doc (@aalexandrov)
• bd246685b Merge pull request #17139 from aalexandrov/remove_qgm (@web-flow)
• 18f68b16f LICENSE: update change date (@Materializer)
• 39d16ac55 release: bump to version v0.40.0 (@benesch)

[materialize-bot]

All PRs and unassociated commits:

• #17043 doc/user: document IDLE ARRANGEMENT MERGE EFFORT replica option (@teskje)
• #17046 compute-client: protocol module (@teskje)
• #17041 test: remove idle_arrangement_merge_effort.td (@teskje)
• #17053 release: bump to version v0.40.0-dev (@guswynn)
• #17033 build(deps): bump boto3 from 1.26.37 to 1.26.45 in /ci/builder (@dependabot[bot])
• #16968 *: remove is_cockroach special casing (@mjibson)
• #16798 compute: wire up persist_source flow control (@teskje)
• #17063 ci: Remove mentions of Postgres in CI steps that use Cockroach (@philip-stoev)
• #17065 cloudtest: Call the Postgres server 'postgres' rather than 'postgres-… (@philip-stoev)
• #17069 Replace some uses of HashMap with BTreeMap (@teskje)
• #17066 mz: make URL in docstring a markdown link (@teskje)
• #17070 adapter: use environment context for LaunchDarkly sync (@aalexandrov)
• #17068 compute-client: add protocol documentation (@teskje)
• #17062 adapter: drop linked cluster if sink fails to create (@benesch)
• #16977 storage: add prometheus stats for all user-facing source stats (@guswynn)
• #17060 adapter: fix storage collection timestamp semantics (@benesch)
• #16606 persist: tag each version of state with a strictly increasing walltime (@danhhz)
• #17085 adapter: de-mut readonly get_local_read_ts (@mjibson)
• #17090 testdrive: Do not run linked-clusters.td with more than 1 replica (@philip-stoev)
• #17089 persist: Convert the multi-node Maelstrom CI job to Cockroach (@philip-stoev)
• #17092 feature-benchmark: Allow running individual scenarios (@philip-stoev)
• #17084 make code links distinguishable. (@nisarhassan12)
• #17094 compute history: fix UpdateConfiguration reduction (@teskje)
• #17095 compute: Move compute metrics to mz-compute crate (@lluki)
• #16969 [persist] Track live/current diff/blob metrics during GC (@bkirwi)
• #17048 Initial version of COMPUTE Layer Q&A (@vmarcos)
• #17039 Design document for improvements to monotonic top-k rendering (@vmarcos)
• #17098 environmentd: filter subsources out of active_sources field in telemetry (@benesch)
• #17086 [persist] Concurrent deletes during persist GC (@bkirwi)
• #17108 persist: retry Blob::open and Consensus::open in maelstrom (@danhhz)
• #17107 Revert "[persist] Always perform routine maintenance (#16654)" (@guswynn)
• #17076 Dynamic persist configuration (part 1) (@teskje)
• #17093 ore: add a tracing layer for LaunchDarkly monitoring (@aalexandrov)
• #17112 doc/user: push down cast to query for a more clear example (@joacoc)
• #17104 adapter: Send notice for unimplemented isolation levels (@jkosh44)
• #17087 doc/user: polish v0.39 release notes (@morsapaes)
• #17113 Fix lowertest parse error msgs (@ggevay)
• #17115 test: Fix flaky storage usage collection test (@jkosh44)
• #17111 environmentd: add connection count by type to telemetry (@benesch)
• #17120 test/upgrade: fix cluster replica sizing (@benesch)
• #17006 Support using AZ-specific services when consuming a privatelink connection in kafka (@chaas)
• #17117 test: Fix flaky retry test (@jkosh44)
• #16937 doc/user: document mz_internal.mz_source_statistics (@guswynn)
• #16936 doc/user: document mz_dependencies (@guswynn)
• #17106 *: remove Stash trait in favor of a single impl (@mjibson)
• #17138 zippy: Add a scenario using the 'latest' Cockroach Docker image (@philip-stoev)
• #17137 optimizer: replace more Hash collections with BTree equivalents (@teskje)
• #17121 Split literal constraints detection from CanonicalizeMfp. (@ggevay)
• #17141 Fix AWS service names in aws-msk.md (@sthm)
• #17128 *: fix nightly unused-deps job (@danhhz)
• #17127 adapter: Pull RTR off the main coord thread (@jkosh44)
• #17149 Remove wrapping token in Rc, irrelevant now (@antiguru)
• #17153 test/cluster: fix a flaky part of the remote storage test (@guswynn)
• #17110 .github: add a CODEOWNERS file to the repository (@benesch)
• #17045 test/upgrade: use standalone CockroachDB (@benesch)
• #17162 materialized: move embedded CockroachDB store to mzdata directory (@benesch)
• #17097 Fix stack overflow in planning set expressions (@tokenrove)
• #16727 ci: Capture dmesg output for the host machine (@philip-stoev)
• #17172 Kafka matrix update versions (@philip-stoev)
• #17173 doc/user: wrap up #17141 (@morsapaes)
• #17143 make the toc scrollable independent of the page. (@nisarhassan12)
• #17133 doc/user: replace mz_now() with now() in the TTL pattern (@joacoc)
• #17119 adapter: remove window_functions feature flag (@aalexandrov)
• #17179 test/restart: fortify stash test (@benesch)
• #17182 Allow mz_introspection user to query any cluster's system catalog (@chaas)
• #17164 build(deps): bump pytest from 7.2.0 to 7.2.1 in /ci/builder (@dependabot[bot])
• #17163 build(deps): bump setuptools from 65.6.3 to 65.7.0 in /ci/builder (@dependabot[bot])
• 7ef011613 LICENSE: update change date (@Materializer)
• d3f0a971c LICENSE: update change date (@Materializer)
• 90f8e070e LICENSE: update change date (@Materializer)
• fbcb1d463 LICENSE: update change date (@Materializer)
• ad06bd5da LICENSE: update change date (@Materializer)
• 9178e16f5 doc/developer: document the existence of CODEOWNERS (@benesch)
• 13271a287 LICENSE: update change date (@Materializer)
• 8abdc9e7f LICENSE: update change date (@Materializer)
• c73d5f696 sql: remove qgm_optimizations from OptimizerConfig (@aalexandrov)
• f285d2d5f sql: remove qgm_optimizations from PlanContext (@aalexandrov)
• 047ab2e6f adapter: remove qgm_optimizations session variable (@aalexandrov)
• 8d6ad365d sql: remove ExplainStage::(Optimized)QueryGraph (@aalexandrov)
• 6852884d0 sql: remove QGM code and tests (@aalexandrov)
• bd18e2bbe doc/developer: remove comment from 101 the Query Compilation 101 doc (@aalexandrov)
• bd246685b Merge pull request #17139 from aalexandrov/remove_qgm (@web-flow)
• 18f68b16f LICENSE: update change date (@Materializer)
• 39d16ac55 release: bump to version v0.40.0 (@benesch)

[benesch]

The commits that are not mine LGTM.

[guswynn]

@benesch's commits LGTM