Prepare Mimir 2.0.0 final

[pracucci]

What this PR does

This PR prepares Mimir for the 2.0.0 final release. It includes:

• Cherry pick docs, jsonnet and bug fixing changes since rc.4 (see detailed list below)
• Update CHANGELOG and VERSION
• Update release instructions
• Fix image tag in jsonnet (it's 2.0.0 and not mimir-2.0.0)
• I had to rebuild the config descriptor (checked in a unit test) to match the release-2.0 branch (doesn't include the new config introduced in Implement remote write forwarding in Distributor #1052

Cherry-picked:

• 524969f Jsonnet: remove cortex_ prefix from settings (Jsonnet: remove cortex_ prefix from settings #1552)
• f725b8b add technology taxonomy for play-with-grafana-mimir tutorial (add technology taxonomy for play-with-grafana-mimir tutorial #1548)
• afb751d Docs: Adds migrate from cortex video (Docs: Adds migrate from cortex video #1545)
• f128d03 Correct substitution for determining docs version from release tags (Correct substitution for determining docs version from release tags #1541)
• c85985e Docs: adds blog post links and videos (Docs: adds blog post links and videos #1546)
• 38ab255 Move tutorials to docs/sources/ (Move tutorials to docs/sources/ #1544)
• 954f267 Fix query sharding when subquery is outside a shardable aggregation function (Fix query sharding when subquery is outside a shardable aggregation function #1542)
• bb52a4f Add internal documentation about our usage of Hugo page bundles (Add internal documentation about our usage of Hugo page bundles #1534)
• 0ee6f3d Docs: adds getting started video (Docs: adds getting started video #1525)
• fb1f0b0 Add hidden GEM usage_reporting block to GEM 1.7 descriptors (mimirtool config: Add hidden usage_reporting block to GEM 1.7 descriptors #1530)
• 70d6771 Add link to issue for OoO chunks in compactor (Add link to issue for OoO chunks in compactor #1538)
• 6ebead2 review migrate thanos and prometheus to mimir (review migrate thanos and prometheus to mimir #1529)
• a200ad0 Validate doc links, anchors, images (Validate doc links, anchors, images #1532)
• 13e9bc0 Docs: Migrate from Cortex to Mimir guide (Docs: Migrate from Cortex to Mimir guide #1477)
• 7e2b33d Docs: move remaining pages with images to Hugo bundles (Docs: move remaining pages with images to Hugo bundles #1528)
• 0500b51 Import memberlist.libsonnet by default, control use of memberlist by config option. (Import memberlist.libsonnet by default, control use of memberlist by config option. #1526)
• 85316e0 Move configuring doc to hugo bundles (Move configuring doc to hugo bundles #1527)
• 4d50cf3 Commit current config descriptor to repo (Commit current config descriptor to repo #1520)
• 5ab5f77 mimirtool config: GEM config extensions (mimirtool config: GEM config extensions #1519)
• d5e5d64 Move architecture doc to hugo bundles (Move architecture doc to hugo bundles #1522)
• c9ff702 Cleaned up CHANGELOG.md

Excluded:

• edb092b Introduce continuous test tool (Introduce continuous test tool #1535)
• e8982fb mimir-continuous-test tool: write series to remote endpoint (mimir-continuous-test tool: write series to remote endpoint #1540)
• e1adf8a Remove dropdowns from Mimir Admin's landing (Remove dropdowns from Mimir Admin's landing #1549)
• ef58c97 Add test for stale field category overrides (Add test for stale field category overrides #1210)

Draft PR because I want to have control over the merge (will merge commit it).

Which issue(s) this PR fixes or relates to

Fixes #

Checklist

• Tests updated
• Documentation added
• CHANGELOG.md updated - the order of entries should be [CHANGE], [FEATURE], [ENHANCEMENT], [BUGFIX]

[jdbaldry]

This PR prepares Mimir for the 2.0.0 final release. It includes:

• Cherry pick docs, jsonnet and bug fixing changes since rc.4 (see detailed list below)
• Update CHANGELOG and VERSION
• Update release instructions
• Fix image tag in jsonnet (it's 2.0.0 and not mimir-2.0.0)
  Link to image tag fix: 3495d0d#diff-61a4e8e35cc34ff7ea64220eb9b1d8b3f43326296eb08f35da8ad04377f1eea6L8-L22
• I had to rebuild the config descriptor (checked in a unit test) to match the release-2.0 branch (doesn't include the new config introduced in Implement remote write forwarding in Distributor Implement remote write forwarding in Distributor #1052

I have validated that this is reflected in the diff.

On the Jsonnet image tag, was that a result of human error in a search and replace process or is there something that is updating that tag for us?
I am guessing the former but wanted to check.

[jdbaldry]

Also, regarding the process, and not this PR specifically. What are the reasons for choosing not to cherry-pick certain commits?

[pracucci]

On the Jsonnet image tag, was that a result of human error in a search and replace process or is there something that is updating that tag for us?

At the beginning we were tagging images with mimir- prefix but it looked weird to see something like grafana/query-tee:mimir-2.0.0 so we decided to just tag them without the mimir- prefix (eg. grafana/query-tee:2.0.0). When we did the change to the tagging script, we forgot to change jsonnet too, which I'm fixing in this PR.

Also, regarding the process, and not this PR specifically. What are the reasons for choosing not to cherry-pick certain commits?

Our policy is not cherry-pick any code change which is not a bug fix. We're expected to cherry-pick only bug fixed or changes to non-code, like docs and jsonnet. We also agreed to allow to cherry-pick any config conversion tool change for the 2.0.0 release.

[jdbaldry]

LGTM, thanks for explaining the process and the changes made.