[Security:Assets:Fleet:Add Integration page]Fields missing error text

[L1nBra]

Description
When the field has errors, text about error has to be present for the field that user would understand what is the error and how to fix it.

Preconditions
Security -> Assets -> Fleet -> Add Integration page is opened.

Steps to reproduce

1.Navigate to allProcesses section by pressing Tab key.
2.Navigate to Operation field.
3.Enter any text (f.e.: testet).
4.Press Tab key.
5.Observe Operation field.

UI elements

Actual Result

• After navigating to another element, field gets red underline, but no error text.

Expected Result

• Error text is present below the field (like: select different operation) after user navigates to another element.

Notes:
Same for:
-Match selectors

-Agent policies

Meta Issue

Kibana Version: 8.17.0-SNAPSHOT

OS: Windows 11 Pro

Browser: Chrome Version 131.0.6778.140 (Official Build) (64-bit)

WCAG or Vendor Guidance (optional)

• Understanding SC 4.1.2: Name, Role, Value (Level A)(https://www.w3.org/WAI/WCAG22/Understanding/name-role-value.html)
• Understanding SC 1.3.1: Info and Relationships (Level A)(https://www.w3.org/WAI/WCAG22/Understanding/info-and-relationships.html)
• Understanding SC 3.3.1: Error Identification (Level A)(https://www.w3.org/WAI/WCAG22/Understanding/error-identification.html)

Related to: https://github.com/elastic/kibana-team/issues/1280

[elasticmachine]

Pinging @elastic/kibana-accessibility (Project:Accessibility)

[elasticmachine]

Pinging @elastic/security-solution (Team: SecuritySolution)