…gins (#23316)

This commit moves the LICENSE.txt and NOTICE.txt files for each plugin
to be alongside the other plugin files, inside the elasticsearch subdir.
This ensures those files are installed alongside the plugin.

…gins (#23316)

This commit moves the LICENSE.txt and NOTICE.txt files for each plugin
to be alongside the other plugin files, inside the elasticsearch subdir.
This ensures those files are installed alongside the plugin.

* master: (54 commits)
  Keep the pipeline handler queue small initially
  Do not create String instances in 'Strings' methods accepting StringBuilder (elastic#22907)
  Tests: fix AwsS3ServiceImplTests
  Remove abstract InternalMetricsAggregation class (elastic#23326)
  Add BulkRequest support to High Level Rest client (elastic#23312)
  Wrap getCredentials() in a doPrivileged() block (elastic#23297)
  Respect promises on pipelined responses
  Align REST specs for HEAD requests
  Remove unnecessary result sorting in SearchPhaseController (elastic#23321)
  Fix SamplerAggregatorTests to have stable and predictable docIds
  Tests: Ensure multi node integ tests wait on first node
  Relocate a comment in HttpPipeliningHandler
  Add comments to HttpPipeliningHandler
  [TEST] Fix incorrect test cluster name in cluster health doc tests
  Build: Change location in zip of license and notice inclusion for plugins (elastic#23316)
  Script: Fix value of `ctx._now` to be current epoch time in milliseconds (elastic#23175)
  Build: Rework integ test setup and shutdown to ensure stop runs when desired (elastic#23304)
  Handle long overflow when adding paths' totals
  Don't set local node on cluster state used for node join validation (elastic#23311)
  Ensure that releasing listener is called
  ...