[chore] Use a generic access/secret key in the secret for AWS connections

[matzew]

Fixes #

Proposed Changes

• 🧹 Update the access/secret key on the K8S secret to be not tied to AWS S3, but be more generic

Pre-review Checklist

• At least 80% unit test coverage
• E2E tests for any new behavior
• Docs PR for any user-facing impact
• Spec PR for any new API feature
• Conformance test for any change to the spec

Release Note

Docs

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 64.58%. Comparing base (f53d038) to head (155d5b1).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ler/integrationsource/resources/containersource.go	0.00%	6 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8312   +/-   ##
=======================================
  Coverage   64.58%   64.58%           
=======================================
  Files         373      373           
  Lines       22619    22619           
=======================================
  Hits        14609    14609           
  Misses       7244     7244           
  Partials      766      766           

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[matzew]

/test reconciler-tests

[pierDipi]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: matzew, pierDipi

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