Fixes version matcher string in demo config installer

[DarshitChanpura]

Description

A bug was discovered in Installer.java while working on #5016, where the version matcher string matched everything after opensearch-security. WIth #5016 introducing packages like opensearch-security-client and openserch-secrurity-common the version matcher spewed out common-3.0.0.0 instead out 3.0.0.0. This PR fixes it to only spew out the version along with qualifier and snapshot string.

Issues Resolved

unblocks #5016

Testing

Unit tests

Check List

• New functionality includes testing
• New functionality has been documented
• New Roles/Permissions have a corresponding security dashboards plugin PR
• API changes companion pull request created
• Commits are signed per the DCO using --signoff

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]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.70%. Comparing base (8803690) to head (bc9590a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5157      +/-   ##
==========================================
+ Coverage   71.69%   71.70%   +0.01%     
==========================================
  Files         337      337              
  Lines       22781    22783       +2     
  Branches     3604     3604              
==========================================
+ Hits        16332    16336       +4     
+ Misses       4647     4645       -2     
  Partials     1802     1802              

Files with missing lines	Coverage Δ
...pensearch/security/tools/democonfig/Installer.java	72.25% <100.00%> (+0.90%)	⬆️

... and 9 files with indirect coverage changes

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