Add samanthajayasinghe as maintainer and approver

[feichashao]

What type of PR is this?

(bug/feature/cleanup/documentation)

What this PR does / Why we need it?

Which Jira/Github issue(s) does this PR fix?

Resolves #

Special notes for your reviewer

Pre-checks (if applicable)

• Ran unit tests locally
• Validated the changes in a cluster
• Included documentation changes with PR

[openshift-ci]

@feichashao: all tests passed!

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[codecov-commenter]

Codecov Report

Merging #291 (be82f6d) into main (6411c2f) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #291   +/-   ##
=======================================
  Coverage   46.91%   46.91%           
=======================================
  Files          53       53           
  Lines        3568     3568           
=======================================
  Hits         1674     1674           
  Misses       1633     1633           
  Partials      261      261           

[bmeng]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bmeng, feichashao

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• OWNERS [bmeng,feichashao]

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