[Backport 2.19] Update the maven snapshot publish endpoint and credential (#5419)

[DarshitChanpura]

(cherry picked from commit 224eb2a)

Description

Backports #5419 to 2.19 branch

Manual backport was required since original PR contains changes in sample-plugin and spi build.gradle that don't exist on 2.19 branch.

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 68.17%. Comparing base (61fe6e7) to head (7c85ff4).
Report is 1 commits behind head on 2.19.

Additional details and impacted files

@@           Coverage Diff           @@
##             2.19    #5452   +/-   ##
=======================================
  Coverage   68.17%   68.17%           
=======================================
  Files         347      347           
  Lines       24625    24625           
  Branches     4084     4084           
=======================================
  Hits        16788    16788           
- Misses       5918     5919    +1     
+ Partials     1919     1918    -1     

see 2 files with indirect coverage changes

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