Add check if security plugin exists in startup script

[rishabh6788]

Description

There are certain cases when a distribution build is built without security plugin. In that case when opensearch-tar-install.sh script is run to start the OS process it fails at this line as there is no opensearch-security plugin present in the bundle.
To overcome this adding a simple condition to check whether opensearch-security plugin exists in the bundle.

Issues Resolved

List any issues this PR will resolve, e.g. Closes [...].

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]

Codecov Report

Merging #3728 (ec46337) into main (420a9a2) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #3728   +/-   ##
=======================================
  Coverage   91.54%   91.54%           
=======================================
  Files         182      182           
  Lines        5420     5420           
=======================================
  Hits         4962     4962           
  Misses        458      458           

[peterzhuamazon]

Offline talk with @rishabh6788 confirms linux work and also test on Windows runs on my machine.

Thanks.

[gaiksaya]

Thanks for fixing this @rishabh6788 Great step for making all RC candidates executable. 🙌