fine-tune network connectivity - both private and public networks are used when "Only private" is selected

[ludmata]

Jenkins and plugins versions report

Environment

```text Jenkins: 2.346.3 OS: Linux - 4.15.0-143-generic --- ace-editor:1.1 ansicolor:1.0.2 ant:475.vf34069fef73c antisamy-markup-formatter:2.7 apache-httpcomponents-client-4-api:4.5.13-138.v4e7d9a_7b_a_e61 badge:1.9.1 bootstrap4-api:4.6.0-5 bootstrap5-api:5.2.0-1 bouncycastle-api:2.26 branch-api:2.1046.v0ca_37783ecc5 build-name-setter:2.2.0 buildtriggerbadge:251.vdf6ef853f3f5 caffeine-api:2.9.3-65.v6a_47d0f4d1fe checks-api:1.7.5 cloud-stats:0.27 cloudbees-folder:6.740.ve4f4ffa_dea_54 command-launcher:84.v4a_97f2027398 conditional-buildstep:1.4.2 config-file-provider:3.11.1 configurationslicing:430.v966357576543 copyartifact:1.47 credentials:1139.veb_9579fca_33b_ credentials-binding:523.vd859a_4b_122e6 cvs:2.19.1 dark-theme:185.v276b_5a_8966a_e description-setter:1.10 display-url-api:2.3.6 durable-task:500.v8927d9fd99d8 echarts-api:5.3.3-1 embeddable-build-status:255.va_d2370ee8fde extended-read-permission:3.2 external-monitor-job:192.ve979ca_8b_3ccd font-awesome-api:6.1.2-1 generic-webhook-trigger:1.84 git:4.11.5 git-client:3.11.2 git-parameter:0.9.17 git-server:1.11 git-tag-message:1.7.1 greenballs:1.15.1 groovy-postbuild:2.5 handlebars:3.0.8 hetzner-cloud:65.ve903c331e5f1 instant-messaging:1.50 ionicons-api:24.va_745a_b_a_97fc3 jabber:1.42 jackson2-api:2.13.3-285.vc03c0256d517 jakarta-activation-api:2.0.1-1 jakarta-mail-api:2.0.1-1 javadoc:226.v71211feb_e7e9 javax-activation-api:1.2.0-4 javax-mail-api:1.6.2-7 jaxb:2.3.6-1 jdk-tool:55.v1b_32b_6ca_f9ca jnr-posix-api:3.1.15-1 jobConfigHistory:1171.v04b_66d78555e jquery:1.12.4-1 jquery3-api:3.6.0-4 jsch:0.1.55.61.va_e9ee26616e7 junit:1119.1121.vc43d0fc45561 ldap:2.11 lockable-resources:2.16 mailer:435.v79ef3972b_5c7 managed-scripts:1.5.4 mapdb-api:1.0.9-28.vf251ce40855d matrix-auth:3.1.5 matrix-project:772.v494f19991984 mattermost:3.1.1 maven-plugin:3.19 mina-sshd-api-common:2.8.0-36.v8e25ce90d4b_1 mina-sshd-api-core:2.8.0-36.v8e25ce90d4b_1 momentjs:1.1.1 nodelabelparameter:1.11.0 pam-auth:1.10 parameterized-trigger:2.45 pipeline-build-step:2.18 pipeline-graph-analysis:195.v5812d95a_a_2f9 pipeline-groovy-lib:612.v84da_9c54906d pipeline-input-step:449.v77f0e8b_845c4 pipeline-milestone-step:101.vd572fef9d926 pipeline-model-api:2.2114.v2654ca_721309 pipeline-model-definition:2.2114.v2654ca_721309 pipeline-model-extensions:2.2114.v2654ca_721309 pipeline-rest-api:2.24 pipeline-stage-step:293.v200037eefcd5 pipeline-stage-tags-metadata:2.2114.v2654ca_721309 pipeline-stage-view:2.24 plain-credentials:139.ved2b_9cf7587b plugin-util-api:2.17.0 popper-api:1.16.1-3 popper2-api:2.11.5-2 postbuild-task:1.9 resource-disposer:0.19 run-condition:1.5 scm-api:621.vda_a_b_055e58f7 script-security:1175.v4b_d517d6db_f0 shiningpanda:0.24 snakeyaml-api:1.30.2-76.vc104f7ce9870 ssh-agent:295.v9ca_a_1c7cc3a_a_ ssh-credentials:295.vced876c18eb_4 ssh-slaves:1.834.v622da_57f702c sshd:3.242.va_db_9da_b_26a_c3 stashNotifier:1.28 structs:324.va_f5d6774f3a_d theme-manager:1.5 thinBackup:1.10 throttle-concurrents:2.8 token-macro:308.v4f2b_ed62b_b_16 trilead-api:1.67.vc3938a_35172f variant:59.vf075fe829ccb workflow-api:1192.v2d0deb_19d212 workflow-basic-steps:991.v43d80fea_ff66 workflow-cps:2759.v87459c4eea_ca_ workflow-durable-task-step:1199.v02b_9244f8064 workflow-job:1207.ve6191ff089f8 workflow-multibranch:716.vc692a_e52371b_ workflow-scm-step:400.v6b_89a_1317c9a_ workflow-step-api:639.v6eca_cd8c04a_a_ workflow-support:838.va_3a_087b_4055b ws-cleanup:0.42 ```

What Operating System are you using (both controller, and any agents involved in the problem)?

Ubuntu 18 - jenkins controller Ubuntu 20 - created cloud agents

Reproduction steps

Set "Connectivity" to "Only private network will be used..." Set "Network ID" and verified it. Saved cloud configuration Run test build

Expected Results

There should be only private network created

Actual Results

There are public and private networks.

Anything else?

No response