[query] influxdb: write endpoint support for M3-Map-Tags-JSON header

[mhoffm-aiven]

What this PR does / why we need it:

This PR enables the M3-Map-Tags-JSON HTTP Header for the influxdb write endpoint similar to prometheus. Supports only adding/replacing a tag similar to what the Prometheus API does.

Support `M3-Map-Tags-JSON` for the influxdb write endpoint

Support `M3-Map-Tags-JSON` for the influxdb write endpoint

[CLAassistant]

All committers have signed the CLA.

[mhoffm-aiven]

Test failures seem unrelated; can anyone help here?

[codecov]

Codecov Report

Merging #3816 (e40889e) into master (e40889e) will not change coverage.
The diff coverage is n/a.

❗ Current head e40889e differs from pull request most recent head 82c11a9. Consider uploading reports for the commit 82c11a9 to get more accurate results

@@          Coverage Diff           @@
##           master   #3816   +/-   ##
======================================
  Coverage    56.9%   56.9%           
======================================
  Files         552     552           
  Lines       63079   63079           
======================================
  Hits        35900   35900           
  Misses      23987   23987           
  Partials     3192    3192           

Flag	Coverage Δ
aggregator	63.3% <0.0%> (ø)
cluster	∅ <0.0%> (∅)
collector	58.4% <0.0%> (ø)
dbnode	60.5% <0.0%> (ø)
m3em	46.4% <0.0%> (ø)
metrics	19.7% <0.0%> (ø)
msg	74.3% <0.0%> (ø)

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[robskillington]

LGTM and thanks for the contribution 👍