bug(tabs): Change props name mat-tab

### Is this a regression?

- [x] Yes, this behavior used to work in the previous version

### The previous version in which this bug was not present was

19.2.17

### Description

Properties mat-tabs not migrated using ng update.

`--mat-tab-header-*` properties were not migrated removing "header".
`--mdc-tab-indicator` only changed `--mdc-tab-indicator-*` to `--mat-tab-*` but ` *-indicator*` was not removed

### Reproduction


### Expected Behavior


### Actual Behavior


### Environment

Angular CLI: 20.0.0
Node: 22.13.1
Package Manager: npm 10.9.2
OS: linux x64

Angular: 20.0.0
... animations, build, cli, common, compiler, compiler-cli, core
... forms, localize, platform-browser, platform-browser-dynamic
... router

Package Version
------------------------------------------------------------
@angular-devkit/architect 0.2000.0
@angular-devkit/core 20.0.0
@angular-devkit/schematics 20.0.0
@angular/cdk 20.0.1
@angular/material 20.0.1
@angular/material-moment-adapter 20.0.1
@schematics/angular 20.0.0
rxjs 7.8.2
typescript 5.8.3

まず、Angular Material 20 と `ng update` を使って移行を再現し、issue で説明されているタブ関連の CSS カスタムプロパティに注目します。Angular Material の移行エントリーポイントを追跡し、`mat-tab-header` と `mdc-tab-indicator` の名前が、余分なセグメントを残さず期待される置換先に変換されることを確認します。

索引モデルが issue の本文から書いたものです。