Add path rewrite to Docmosis lower envs

[ieuanb74]

Jira link (if applicable)

https://tools.hmcts.net/jira/browse/DTSPO-18049

Change description

• Creates ingress and middleware to rewrite /rs/... to /api/... in aat and perftest
• Already in demo from previous test
• Updated kustomization.yaml with new ingress in aat, demo and perftest

Checklist

• [x] commit messages are meaningful and follow good commit message guidelines
• [x] README and other documentation has been updated / added (if needed)
• [x] tests have been updated / new tests has been added (if needed)
• [ ] Does this PR introduce a breaking change

🤖AEP PR SUMMARY🤖

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• Added docmosis-ingress.yaml in apps/docmosis/aat/base/ with Ingress and Middleware configurations for Traefik.
• Updated kustomization.yaml in apps/docmosis/aat/base/ to include docmosis-ingress.yaml.
• Updated kustomization.yaml in apps/docmosis/demo/base/ to include docmosis-ingress.yaml.
• Updated kustomization.yaml in apps/docmosis/ithc/base/ to include docmosis-ingress.yaml.
• Added docmosis-ingress.yaml in apps/docmosis/perftest/base/ with Ingress and Middleware configurations for Traefik.
• Updated kustomization.yaml in apps/docmosis/perftest/base/ to include docmosis-ingress.yaml.