Backtick supports, issues fixes

[mengweieric]

Description

• wrap backtick for any field piped to query builder and proper rendering
• timeseries only has timestamp field in selector
• Pie/heatmap rendering issue

Issues Resolved

[List any issues this PR will resolve]

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov-commenter]

Codecov Report

Merging #1250 (26cdef0) into 2.4 (bfda43a) will decrease coverage by 20.27%.
The diff coverage is 56.14%.

@@              Coverage Diff              @@
##                2.4    #1250       +/-   ##
=============================================
- Coverage     70.27%   49.99%   -20.28%     
=============================================
  Files            42      242      +200     
  Lines          2395     7431     +5036     
  Branches        248     2050     +1802     
=============================================
+ Hits           1683     3715     +2032     
- Misses          571     3685     +3114     
+ Partials        141       31      -110     

Flag	Coverage Δ
dashboards-observability	49.99% <56.14%> (?)
opensearch-observability	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ty/common/query_manager/ast/expression/group_by.ts	50.00% <0.00%> (ø)
...alizations/shared_components/empty_placeholder.tsx	100.00% <ø> (ø)
...public/components/visualizations/visualization.tsx	60.00% <0.00%> (ø)
...ts/visualizations/charts/data_table/data_table.tsx	44.21% <20.00%> (ø)
.../components/visualizations/charts/maps/heatmap.tsx	22.07% <44.44%> (ø)
...ublic/components/visualizations/charts/pie/pie.tsx	43.33% <50.00%> (ø)
.../components/visualizations/charts/shared/common.ts	89.58% <84.61%> (ø)
...shboards-observability/common/utils/query_utils.ts	19.14% <100.00%> (ø)
...ions/shared_components/vis_canvass_placeholder.tsx	100.00% <100.00%> (ø)
.../public/components/event_analytics/utils/utils.tsx	56.28% <100.00%> (ø)
... and 285 more

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