Embed elasticsearch index templates

[Shaddoll]

What changed?
Add embeddings for elasticsearch mappings

Why?
To make it easier to access elasticsearch mappings from monorepo

How did you test it?

Potential risks

Release notes

Documentation Changes

[coveralls]

Pull Request Test Coverage Report for Build 0185074b-ee84-411a-8cab-bf78b21b66d1

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 64 unchanged lines in 10 files lost coverage.
• Overall coverage increased (+0.04%) to 57.291%

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Files with Coverage Reduction	New Missed Lines	%
common/task/weightedRoundRobinTaskScheduler.go	1	89.64%
common/task/parallelTaskProcessor.go	2	92.75%
common/util.go	2	52.54%
service/frontend/workflowHandler.go	2	59.98%
service/history/shard/context.go	2	66.52%
common/cache/lru.go	3	90.73%
common/persistence/statsComputer.go	3	94.64%
service/history/task/fetcher.go	4	91.24%
common/persistence/nosql/nosqlplugin/cassandra/workflow.go	6	59.55%
common/persistence/nosql/nosqlplugin/cassandra/workflowParsingUtils.go	39	81.99%

Totals
Change from base Build 0184fde3-10d4-4db9-8cc6-b31a82033c01:	0.04%
Covered Lines:	85211
Relevant Lines:	148734

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💛 - Coveralls