feat: upgrade Flux to v0.83.2

[wolffcm]

Closes #19468

This upgrades Flux to version 0.83.2.

In the first commit I just copied the old (before the split) contents of influxdb/query/ into the current master. So, you may find it helpful to look at this diff, that compares that commit to the head of this branch:
2438776...feat/upgrade-flux-to-v0.83.1

This makes it easier to see what I changed by hand.

Here's a summary of what I did:

• Returned to the modern way of initializing Flux runtime
• Restored cmd/influxd/launcher/query_test.go to its previous state (still skipping pushdown tests)
• Restored http/query.go and http/query_test.go to their previous state
• Reapplied many, but not all, of the commits from this issue: Port rejected commits after Flux has been upgraded #19444 (more on this below)
• Removed temporary copy of modern Flux in pkg/flux, and updated references to it
• In query/ most of the code is the same as before the split, except the code for to() and experimental.to(). Here I left in @stuartcarnie 's changes that make these both work.

On the commits from #19444 that didn't get reapplied after the split, I kept all of them except:

• revert(storage): Revert feat(influxql): Implement DELETE & DROP MEASUREMENT 1501351 cc/ @benbjohnson
  That one seems like it will need to be ported to work with the new storage engine?

I also kept the commits that add a new feature flag for injecting task last success time, since it reapplied cleanly:

• revert(tasks): Revert feat(task): Inject Task's LatestSuccess Timestamp In Flux Extern (feat(task): Inject Task's LatestSuccess Timestamp In Flux Extern #19402) via 1ae2541 cc/ @brettbuddin

There were several Flux end-to-end-tests that failed after upgrading Flux. I filed issues for them:

• Pushed down range stop bound is not longer exclusive Pushed down range stop bound is not longer exclusive #19564
• Fix bugs and reenable PushDownReadTagValuesRule and PushDownReadTagKeysRule Fix bugs and reenable PushDownReadTagValuesRule and PushDownReadTagKeysRule #19561
• Flux end-to-end test influxql/elapsed failing with different answer Flux end-to-end test influxql/elapsed failing with different answer #19568
• Flux end-to-end test failing with "field type conflict" Flux end-to-end test failing with "field type conflict" #19565

• Well-formatted commit messages
• Rebased/mergeable
• Tests pass

[jacobmarble]

The small quantity of storage code LGTM

[stuartcarnie]

@wolffcm / @benbjohnson I re-implemented DELETE / DROP MEASUREMENT via #19549 to talk to TSM1

[stuartcarnie]

Looks good to me – great work, @wolffcm!

I ran this branch locally, feeding it some telegraf data and verified the output of Flux and InfluxQL. The only difference is where the windows start, but otherwise the numbers match 💯

InfluxQL

Query

curl -v -u ${INFLUX_USER}:${INFLUX_TOKEN} -H Content-Type:application/vnd.influxql -H Accept:text/plain ${INFLUX_HOST}/query\?db=my-bucket --data-binary "select mean(usage_system), mean(usage_user) from cpu where cpu='cpu-total' and time > now() - 1h group by time(1m) fill(none)"

Output

name: cpu
time                          mean               mean_1
----                          ----               ------
2020-09-16 19:41:00 +0000 UTC 2.9198681258211403 5.292570832522467
2020-09-16 19:42:00 +0000 UTC 1.9832891660092988 3.058275498670035
2020-09-16 19:43:00 +0000 UTC 2.544792363245724  4.052888237566831
2020-09-16 19:44:00 +0000 UTC 1.8886189464117715 3.1189570386709
2020-09-16 19:45:00 +0000 UTC 1.841633520255214  2.568726119485858
2020-09-16 19:46:00 +0000 UTC 1.7749434246601743 3.0915269274326174
2020-09-16 19:47:00 +0000 UTC 1.812600693052109  3.427265186672049
2020-09-16 19:48:00 +0000 UTC 1.7500492149990279 2.8813245783993326
2020-09-16 19:49:00 +0000 UTC 1.9603237111153404 3.361274240750055
2020-09-16 19:50:00 +0000 UTC 1.682340091326152  2.502154705310155
2020-09-16 19:51:00 +0000 UTC 1.80315887143924   2.8188620228994257
2020-09-16 19:52:00 +0000 UTC 1.7530775060454051 3.534266400071696
2020-09-16 19:53:00 +0000 UTC 2.06786301770364   4.019988594516871
2020-09-16 19:54:00 +0000 UTC 1.8425985358743213 3.747834838625534
2020-09-16 19:55:00 +0000 UTC 1.6385691186518805 3.852273992401868
2020-09-16 19:56:00 +0000 UTC 1.5833621177356518 3.4416504741237843
2020-09-16 19:57:00 +0000 UTC 1.6311448927276098 4.307079769121812
2020-09-16 19:58:00 +0000 UTC 1.5969358803294724 3.0137355054165647
2020-09-16 19:59:00 +0000 UTC 1.6029566972286364 2.012266481482333

Flux

Query

curl -v -H 'content-type:application/vnd.flux' -H "Authorization: Token ${INFLUX_TOKEN}" ${INFLUX_HOST}/api/v2/query\?org\=my-org --data-binary 'from(bucket: "my-bucket") |> range(start: -1h) |> filter(fn: (r) => r["_measurement"] == "cpu" and (r["_field"] == "usage_user" or r["_field"] == "usage_system") and r["cpu"] == "cpu-total") |> aggregateWindow(every: 10s, fn: mean, createEmpty: false) |> pivot(rowKey:["_time"], columnKey: ["_field"], valueColumn: "_value") |> drop(columns:["_start", "_stop", "host", "_measurement", "cpu"])'

Output

,result,table,_time,usage_system,usage_user
,_result,0,2020-09-16T19:42:00Z,2.9198681258211403,5.292570832522467
,_result,0,2020-09-16T19:43:00Z,1.9832891660092988,3.058275498670035
,_result,0,2020-09-16T19:44:00Z,2.544792363245724,4.052888237566831
,_result,0,2020-09-16T19:45:00Z,1.8886189464117715,3.1189570386709
,_result,0,2020-09-16T19:46:00Z,1.841633520255214,2.568726119485858
,_result,0,2020-09-16T19:47:00Z,1.7749434246601743,3.0915269274326174
,_result,0,2020-09-16T19:48:00Z,1.812600693052109,3.427265186672049
,_result,0,2020-09-16T19:49:00Z,1.7500492149990279,2.8813245783993326
,_result,0,2020-09-16T19:50:00Z,1.9603237111153404,3.361274240750055
,_result,0,2020-09-16T19:51:00Z,1.682340091326152,2.502154705310155
,_result,0,2020-09-16T19:52:00Z,1.80315887143924,2.8188620228994257
,_result,0,2020-09-16T19:53:00Z,1.7530775060454051,3.534266400071696
,_result,0,2020-09-16T19:54:00Z,2.06786301770364,4.019988594516871
,_result,0,2020-09-16T19:55:00Z,1.8425985358743213,3.747834838625534
,_result,0,2020-09-16T19:56:00Z,1.6385691186518805,3.852273992401868
,_result,0,2020-09-16T19:57:00Z,1.5833621177356518,3.4416504741237843
,_result,0,2020-09-16T19:58:00Z,1.6311448927276098,4.307079769121812
,_result,0,2020-09-16T19:59:00Z,1.5969358803294724,3.0137355054165647
,_result,0,2020-09-16T19:59:33.855846Z,1.6604894184520498,2.1355091120673584

[stuartcarnie]

👏 👏