OSDOCS-9949: Removed an egress section from the ROSA docs

[EricPonvelle]

Version(s):
enterprise-4.15+

Issue:
OSDOCS-9949

Link to docs preview:

• Configuring an egress IP address
  

QE review:

• QE has approved this change.

Additional information:
Conditioned out "Considerations for using an egress IP on additional network interfaces" from ROSA docs

[openshift-ci-robot]

@EricPonvelle: This pull request references OSDOCS-9949 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the bug to target the "4.16.0" version, but no target version was set.

In response to this:

Version(s):
enterprise-4.15+

Issue:
OSDOCS-9949

Link to docs preview:

• Configuring an egress IP address
  

QE review:

• QE has approved this change.

Additional information:
Conditioned out "Considerations for using an egress IP on additional network interfaces" from ROSA docs

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[ocpdocs-previewbot]

🤖 Tue Mar 12 14:51:23 - Prow CI generated the docs preview:
https://72991--ocpdocs-pr.netlify.app

[openshift-ci]

@EricPonvelle: all tests passed!

Full PR test history. Your PR dashboard.

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[kumuduh]

Reviewed. /lgtm

[EricPonvelle]

/cherrypick enterprise-4.15

[EricPonvelle]

/cherrypick enterprise-4.16

[openshift-cherrypick-robot]

@EricPonvelle: new pull request created: #73015

In response to this:

/cherrypick enterprise-4.15

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[openshift-cherrypick-robot]

@EricPonvelle: new pull request created: #73016

In response to this:

/cherrypick enterprise-4.16

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.