Update doc to add more breaking change items from TypeSpec migration (#25348)

* update client customization

* Add more migration breaking change items

* refine with review

* Update documentation/development/breaking-changes/sdk-breaking-changes-guide-migration.md

Co-authored-by: Rick Winter <[email protected]>

* Update documentation/development/breaking-changes/sdk-breaking-changes-guide-migration.md

Co-authored-by: Rick Winter <[email protected]>

* update

* add a new item

* added antoher item

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Co-authored-by: tadelesh <[email protected]>
Co-authored-by: Rick Winter <[email protected]>

Author: 3 people