feat(tsdb): Implement delete with predicate.

[benbjohnson]

Overview

This pull request implements the "delete with predicate" API that was previously disabled. It works by implementing a new tsdb.Store.DeleteSeriesWithPredicate() function that operates on a predicate directly instead of an influxql.Expr. This PR also adds a PredicateSeriesIDIterator that filters an underlying iterator by predicate.

Note: The predicate does not currently support OR. That will need to be implemented separately.

Closes #19635

Usage

Write two points into the influx bucket:

$ influx write -b influx "cpu,region=us-east-1 value=1"
$ influx write -b influx "cpu,region=us-west-1 value=1"

Query to verify points exist.

$ influx query 'from(bucket:"influx")|>range(start:0)' 
Result: _result
Table: keys: [_start, _stop, _field, _measurement, region]
                   _start:time                      _stop:time           _field:string     _measurement:string           region:string                      _time:time                  _value:float  
------------------------------  ------------------------------  ----------------------  ----------------------  ----------------------  ------------------------------  ----------------------------  
1970-01-01T00:00:00.000000000Z  2020-12-02T17:00:07.917155000Z                   value                     cpu               us-east-1  2020-12-02T17:00:03.448750000Z                             1  
Table: keys: [_start, _stop, _field, _measurement, region]
                   _start:time                      _stop:time           _field:string     _measurement:string           region:string                      _time:time                  _value:float  
------------------------------  ------------------------------  ----------------------  ----------------------  ----------------------  ------------------------------  ----------------------------  
1970-01-01T00:00:00.000000000Z  2020-12-02T17:00:07.917155000Z                   value                     cpu               us-west-1  2020-12-02T17:00:06.027808000Z                             1  

Delete point in us-west-1 using predicate:

$ influx delete --org influx --bucket influx --start 2020-12-01T00:00:00Z --stop 2020-12-31T00:00:00Z --predicate '_measurement="cpu" AND region="us-west-1"'

Query again to verify only one point exists:

$ influx query 'from(bucket:"influx")|>range(start:0)' 
Result: _result
Table: keys: [_start, _stop, _field, _measurement, region]
                   _start:time                      _stop:time           _field:string     _measurement:string           region:string                      _time:time                  _value:float  
------------------------------  ------------------------------  ----------------------  ----------------------  ----------------------  ------------------------------  ----------------------------  
1970-01-01T00:00:00.000000000Z  2020-12-02T17:01:17.979115000Z                   value                     cpu               us-east-1  2020-12-02T17:00:03.448750000Z                             1  

TODO

• CHANGELOG.md updated with a link to the PR (not the Issue)
• Well-formatted commit messages
• Rebased/mergeable
• Tests pass
• http/swagger.yml updated (if modified Go structs or API)
• Feature flagged (if modified API)
• Documentation updated or issue created (provide link to issue/pr)
• Signed CLA (if not already signed)

[danxmoran]

Obligatory nitpick: can you add a line to CHANGELOG.md?

[danxmoran]

Some cleanup questions, but overall LGTM. Thanks for adding the test!

[zbot473]

Do I have to build this myself, or will the nightly version build later?