Add auto create action

[martijnvg]

Backport of #55858 to 7.x branch.

Currently the TransportBulkAction detects whether an index is missing and
then decides whether it should be auto created. The coordination of the
index creation also happens in the TransportBulkAction on the coordinating node.

This change adds a new transport action that the TransportBulkAction delegates to
if missing indices need to be created. The reasons for this change:

• Auto creation of data streams can't occur on the coordinating node.
  Based on the index template (v2) either a regular index or a data stream should be created.
  However if the coordinating node is slow in processing cluster state updates then it may be
  unaware of the existence of certain index templates, which then can load to the
  TransportBulkAction creating an index instead of a data stream. Therefor the coordination of
  creating an index or data stream should occur on the master node. See Auto create data streams using index templates v2 #55377

• From a security perspective it is useful to know whether index creation originates from the
  create index api or from auto creating a new index via the bulk or index api. For example
  a user would be allowed to auto create an index, but not to use the create index api. The
  auto create action will allow security to distinguish these two different patterns of
  index creation.
  This change adds the following new transport actions:

AutoCreateAction, the TransportBulkAction redirects to this action and this action will actually create the index (instead of the TransportCreateIndexAction). Later via #55377, can improve the AutoCreateAction to also determine whether an index or data stream should be created.

The create_index index privilege is also modified, so that if this permission is granted then a user is also allowed to auto create indices. This change does not yet add an auto_create index privilege. A future change can introduce this new index privilege or modify an existing index / write index privilege.

Relates to #53100

[elasticmachine]

Pinging @elastic/es-core-features (:Core/Features/Indices APIs)

[martijnvg]

@elasticmachine run elasticsearch-ci/1