[release/8.0-preview6] [Blazor] Form mapping error handling and validation integration for SSR Blazor

[github-actions]

Backport of #48990 to release/8.0-preview6

/cc @javiercn

[Blazor] Form mapping error handling and validation integration for SSR Blazor

Adds support for error handling and validation to Server Side Rendered Blazor.

Description

Integrates the form data binding experience with Blazor and provides support for error handling.

Fixes #46983 (in this specific format)

Customer Impact

This is one of the remaining major functionalities for Blazor Server Side rendering, so we want to make sure we can get as much feedback as possible on the experience. Specially since we are planning an app building exercise.

Regression?

• Yes
• No

[If yes, specify the version the behavior has regressed from]

Risk

• High
• Medium
• Low

The changes should be additive, and we've included a significant amount of test coverage for the new functionality.

Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

---

When servicing release/2.1

• Make necessary changes in eng/PatchConfig.props

[SteveSandersonMS]

Already approved equivalent PR against main

[captainsafia]

Already approved equivalent PR against main

I've merged to both this branch and the one set to target main a change that updates the minimal APIs implementation to react to the API changes in this PR. This should unblock the test failures in the build.

[ghost]

Hi @github-actions[bot]. Please make sure you've updated the PR description to use the Shiproom Template. Also, make sure this PR is not marked as a draft and is ready-to-merge.

To learn more about how to prepare a servicing PR click here.

[ghost]

Hi @github-actions[bot]. This PR was just approved to be included in the upcoming servicing release. Somebody from the @dotnet/aspnet-build team will get it merged when the branches are open. Until then, please make sure all the CI checks pass and the PR is reviewed.