Backport of feat: Change global-read-only policy to non editable into release/1.15.x

[valeriia-ruban]

Description

PR is manually created to backport #18602

Testing & Reproduction steps

1. set up CONSUL_ACLS_ENABLE to 1 in session storage
2. set CONSUL_POLICY_COUNT = 10
3. go to Policies
4. log in with any securId
5. check list of items to see global-read-only policy
6. go to the policy details and check that form is non-editable

Links

JIRA
Figma

PR Checklist

• updated test coverage
• external facing docs updated
• appropriate backport labels added
• not a security concern

[hashicorp-cla]

Thank you for your submission! We require that all contributors sign our Contributor License Agreement ("CLA") before we can accept the contribution. Read and sign the agreement

Learn more about why HashiCorp requires a CLA and what the CLA includes

---

1 out of 2 committers have signed the CLA.

• valeriia-ruban
• temp

---

temp seems not to be a GitHub user.
You need a GitHub account to be able to sign the CLA. If you already have a GitHub account, please add the email address used for this commit to your account.

_{Have you signed the CLA already but the status is still pending? Recheck it.}