MudAutocomplete: Remove SearchFuncWithCancel, Add CancellationToken to SearchFunc

[jperson2000]

This breaking change removes the SearchFuncWithCancel method and moves the CancellationToken functionality to the SearchFunc method.

Description

Recent changes to the MudTable ServerData method (PR 8407) led to a desire to use the same single-method pattern for other cancelable methods. This update:

• Removes the SearchFuncWithCancel method
• Moves the CancellationToken parameter to the SearchFunc method
• Updates all tests and examples to include the new CancellationToken parameter.

How Has This Been Tested?

Existing tests for MudAutocomplete were modified to include the CancellationToken parameter.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• The PR is submitted to the correct branch (dev).
• My code follows the code style of this project.
• I've added relevant tests.

Notes for Reviewers

This should probably get a v7 tag and be released with similar breaking changes to MudTable in the works for #8447

[henon]

There are conflicts. Please merge dev to resolve them.

Added to v7.0.0 Migration Guide #8447

[ScarletKuro]

LGTM, just need to rebase and fix conflicts like henon said.

[jperson2000]

Alright, thanks again for all the reviews and feedback! I've rebased onto dev and added 1 commit to re-implement the new token parameter in MudBlazor.Docs\Shared\AppBar.razor.

[henon]

Next time please just merge dev, somehow rebasing with Visual Studio messes up the PR. You are done, however, so it doesn't really matter. Just so you know.

[henon]

And thanks for the contribution @jperson2000 !