Prevent duplicity post of creating/replacing elyra secret

[DaoDaoNoCode]

JIRA: https://issues.redhat.com/browse/RHOAIENG-10719

Description

Add a ref to prevent simultaneously creating/replacing the elyra secret, and rewrite the hook a little bit to make it more readable.

How Has This Been Tested?

1. Create a project
2. Configure a pipeline server
3. Make sure there is no 409 conflict error message in the console when creating ds-pipeline-config secret

Test Impact

N/A, needs e2e live test for that which #3028 will cover.

Request review criteria:

Self checklist (all need to be checked):

• The developer has manually tested the changes and verified that the changes work
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has added tests or explained why testing cannot be added (unit or cypress tests for related changes)

If you have UI changes:

• Included any necessary screenshots or gifs if it was a UI change.
• Included tags to the UX team if it was a UI/UX change.

After the PR is posted & before it merges:

• The developer has tested their solution on a cluster by using the image produced by the PR to main

[pnaik1]

Tested locally
no 409 conflict, I see only one post request for the secret
/lgtm

[Gkrumbach07]

/approve

this looks good.

[Gkrumbach07]

/approve
/lgtm

[openshift-ci]

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This pull-request has been approved by: Gkrumbach07

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[codecov]

Codecov Report

Attention: Patch coverage is 61.11111% with 7 lines in your changes missing coverage. Please review.

Project coverage is 85.13%. Comparing base (3e40d40) to head (0432780).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...concepts/pipelines/context/useManageElyraSecret.ts	61.11%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3120      +/-   ##
==========================================
- Coverage   85.17%   85.13%   -0.04%     
==========================================
  Files        1251     1251              
  Lines       27436    27443       +7     
  Branches     7280     7283       +3     
==========================================
- Hits        23369    23364       -5     
- Misses       4067     4079      +12     

Files with missing lines	Coverage Δ
...concepts/pipelines/context/useManageElyraSecret.ts	71.79% <61.11%> (-0.09%)	⬇️

... and 3 files with indirect coverage changes

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