ROX-23551: Add EgressFirewall to Tenant Helm chart

[ebensh]

Description

Add EgressFirewall to the Fleetshard Sync Tenant Helm chart.

This restricts the Central's RDS access to only its instance.

Document discussing the changes: https://docs.google.com/document/d/15-rlsU_wDsv6TX_2hKHNFir82W1T9Ov1SOnRSha1VUY/edit

Checklist (Definition of Done)

• Unit and integration tests added
• Added test description under Test manual
• Documentation added if necessary (i.e. changes to dev setup, test execution, ...)
• CI and all relevant tests are passing
• Add the ticket number to the PR title if available, i.e. ROX-12345: ...
• Discussed security and business related topics privately. Will move any security and business related topics that arise to private communication channel.
• Add secret to app-interface Vault or Secrets Manager if necessary
• RDS changes were e2e tested manually
• Check AWS limits are reasonable for changes provisioning new resources
• (If applicable) Changes to the dp-terraform Helm values have been reflected in the addon on integration environment

Test manual

TODO: Add manual testing efforts

# To run tests locally run:
make db/teardown db/setup db/migrate
make ocm/setup
make verify lint binary test test/integration

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ebensh

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[openshift-merge-robot]

PR needs rebase.

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[openshift-ci]

@ebensh: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/images	37eb9ec	link	true	/test images
ci/prow/e2e	37eb9ec	link	true	/test e2e

Full PR test history. Your PR dashboard.

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