Test updates for 1.22.0 release

[trdoyle81]

/kind failing-test

What does this PR do / why we need it:

Fixes 5 failing e2e tests on s390x with GitOps 1.22.0 RC4. Updates test expectations to match RC4 component versions and addresses infrastructure limitations.

Changes include:

• Updated toolchain version expectations (Argo CD v3.5.3, Redis 7.2.16, Dex v2.45.1, Helm v4.2.4, Kustomize v5.8.1)
• Fixed CSV permission test to use v1.22.0 expectations instead of v1.16.0
• Replaced guestbook image with multi-arch nginx for s390x support
• Added s390x Skip checks for Gitea tests with TODO for building custom image

Have you updated the necessary documentation?

• Documentation has been updated.

Which issue(s) this PR fixes:

Fixes #GITOPS-9446

Test acceptance criteria:

• E2E Test

How to test changes / Special notes to the reviewer:

Verified on cluster with GitOps 1.22.0 RC4:

• 1-031_validate_toolchain:
• 1-090_validate_permissions:
• 1-121_validate_image_updater:
• 1-141_source_hydrator (Gitea tests): Skip on s390x (upstream limitation)

Run tests:
ginkgo -v -focus "1-031|1-090|1-121" ./test/openshift/e2e/ginkgo/parallel

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[trdoyle81]

/retest

[trdoyle81]

/retest-required

[trdoyle81]

/test v4.22-kuttl-parallel

[trdoyle81]

/test v4.22-kuttl-parallel

[olivergondza]

/lgtm
/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: olivergondza

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[trdoyle81]

/retest

[chengfang]

/test v4.22-kuttl-parallel

[ranakan19]

is this still planned to be merged, given 1.22.0 release is out?

[svghadi]

/retest

[openshift-ci]

New changes are detected. LGTM label has been removed.

[varshab1210]

/test v4.22-kuttl-parallel