[2.x] Bump to 2.7.0 version

[junqiu-lei]

Description

Bump version to 2.7.0 in 2.x branch

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
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[codecov-commenter]

Codecov Report

Merging #356 (bf83d26) into 2.x (59cb429) will not change coverage.
The diff coverage is n/a.

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@@           Coverage Diff           @@
##              2.x     #356   +/-   ##
=======================================
  Coverage   83.89%   83.89%           
=======================================
  Files          19       19           
  Lines         478      478           
  Branches       73       73           
=======================================
  Hits          401      401           
  Misses         55       55           
  Partials       22       22           

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[junqiu-lei]

The OSD start failed at 2.x for E2E test

The @mapbox/mapbox-gl-draw isn’t exiting at 2.x package.json but at main branch, I think we need backport the change #247 @VijayanB

Module not found: Error: Can't resolve '@mapbox/mapbox-gl-draw' in '/Users/junqiu/WebstormProjects/OpenSearch-Dashboards/plugins/dashboards-maps/public/components/toolbar/spatial_filter'
       │          resolve '@mapbox/mapbox-gl-draw' in '/Users/junqiu/WebstormProjects/OpenSearch-Dashboards/plugins/dashboards-maps/public/components/toolbar/spatial_filter'
       │            Parsed request is a module
       │            using description file: /Users/junqiu/WebstormProjects/OpenSearch-Dashboards/plugins/dashboards-maps/package.json (relative path: ./public/components/toolbar/spatial_filter)
       │              Field 'browser' doesn't contain a valid alias configuration
       │              resolve as module
       │                /Users/junqiu/WebstormProjects/OpenSearch-Dashboards/plugins/dashboards-maps/public/components/toolbar/spatial_filter/node_modules doesn't exist or is not a directory
       │                /Users/junqiu/WebstormProjects/OpenSearch-Dashboards/plugins/dashboards-maps/public/components/toolbar/node_modules doesn't exist or is not a directory
       │                /Users/junqiu/WebstormProjects/OpenSearch-Dashboards/plugins/dashboards-maps/public/components/node_modules doesn't exist or is not a directory
       │                /Users/junqiu/WebstormProjects/OpenSearch-Dashboards/plugins/dashboards-maps/public/node_modules doesn't exist or is not a directory
       │                /Users/junqiu/WebstormProjects/OpenSearch-Dashboards/plugins/node_modules doesn't exist or is not a directory
       │                /Users/junqiu/WebstormProjects/node_modules doesn't exist or is not a directory
       │                /Users/junqiu/node_modules doesn't exist or is not a directory
       │                /Users/node_modules doesn't exist or is not a directory
       │                /node_modules doesn't exist or is not a directory