RHDEVDOCS-5912 - Updates to the argo cd CLI installation and reference sections

[Srivaralakshmi]

Jira issue: RHDEVDOCS-5912

Aligned team: DevTools
Cherry-pick to versions: gitops-docs-1.12

Docs preview:

• Installing the GitOps CLI
• GitOps argocd CLI reference
• Red Hat OpenShift GitOps release notes

SME review: Completed by @anandf

QE review: Completed by @varshab1210

Peer review:

Additional information: This PR is related to #72634. The content was already reviewed and approved. Due to the content gateway link issue from the Engineering side, certain installation procedures were commented out during the GitOps 1.12 GA. This PR comments-in back those procedures while adding admonition and updates to the content gateway links and their steps. TY!

[ocpdocs-previewbot]

🤖 Wed May 08 14:18:58 - Prow CI generated the docs preview:
https://75177--ocpdocs-pr.netlify.app
Complete list of updated preview URLs: artifacts/updated_preview_urls.txt

[Srivaralakshmi]

Hi, @anandf and @varshab1210: PTAL at the PR and help with your review inputs. Thanks!

[varshab1210]

LGTM, thanks

[Srivaralakshmi]

@anandf I have fixed the review comments. PTAL at the revised PR and provide feedback. Thank you!

[anandf]

LGTM

[Srivaralakshmi]

Thanks @adellape for the review comments. I have addressed them all and squashed the commits too. PTAL at it and merge the PR if everything checks okay.

[openshift-ci]

@Srivaralakshmi: all tests passed!

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[adellape]

/cherrypick gitops-docs-1.12

[adellape]

@Srivaralakshmi Should this be picked to gitops-docs-1.13 as well or no?

[openshift-cherrypick-robot]

@adellape: new pull request created: #75673

In response to this:

/cherrypick gitops-docs-1.12

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.

[Srivaralakshmi]

@Srivaralakshmi Should this be picked to gitops-docs-1.13 as well or no?

@adellape Yes, CP to gitops-docs-1.13 too please! Thanks for asking :)

[adellape]

/cherrypick gitops-docs-1.13

[openshift-cherrypick-robot]

@adellape: #75177 failed to apply on top of branch "gitops-docs-1.13":

Applying: updates to argo cd CLI doc sections
.git/rebase-apply/patch:104: trailing whitespace.
. Enable the repositories required by {gitops-title} for {op-system-base} version 8 or later by running the following command: 
warning: 1 line adds whitespace errors.
Using index info to reconstruct a base tree...
M	release_notes/gitops-release-notes.adoc
Falling back to patching base and 3-way merge...
Auto-merging release_notes/gitops-release-notes.adoc
CONFLICT (content): Merge conflict in release_notes/gitops-release-notes.adoc
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 updates to argo cd CLI doc sections
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherrypick gitops-docs-1.13

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.

[adellape]

@Srivaralakshmi As discussed on Slack, we're fine with the gitops-docs-1.13 CP failing because that branch will be rebased from gitops-docs-main when 1.13 development begins in earnest.