Add end-to-end tests to verify operator respects cluster-wide and CRD-level TLS profiles.

Test file to create:

• test/e2e/e2e_tls_test.go

Test scenarios:

1. Default TLS Profile:

• Deploy Kueue without TLS profile in CRD or APIServer
• Verify Intermediate profile is applied (TLS 1.2 minimum)
• Verify correct cipher suites are used

2. Cluster-wide TLS Profile:

• Set TLS profile on APIServer to Old
• Deploy Kueue without TLS profile in CRD
• Verify Old profile is applied to Kueue endpoints

3. CRD Override:

• Set TLS profile on APIServer to Intermediate
• Set TLS profile on Kueue CRD to Modern
• Verify Modern profile takes precedence

4. Dynamic Updates:

• Deploy Kueue with Intermediate profile
• Change APIServer TLS profile to Old
• Verify Kueue pods are rolled out with new TLS settings

5. Custom Profile:

• Set Custom TLS profile with specific ciphers
• Verify only specified ciphers are accepted

Acceptance Criteria:

• E2E tests verify TLS settings on all Kueue endpoints
• Tests verify dynamic TLS profile updates
• Tests verify CRD override precedence
• Tests run in CI pipeline

Depends on: OCPKUEUE-464 (unit tests)