model: Granite Speech Plus (#24818)

• feat: Add conversion support for Granite Speech Plus

Branch: GraniteSpeechPlus AI-usage: full (Bob, OpenCode + Qwen3.6-35b) Signed-off-by: Gabe Goodhart [email protected]

• feat: Extend granite_speech to support plus multi-layer concatenation

Branch: GraniteSpeechPlus AI-usage: draft (Bob, OpenCode + Qwen3.6-35b) Signed-off-by: Gabe Goodhart [email protected]

• fix(conversion): Fix plural naming for feature_layers for audio

Branch: GraniteSpeechPlus AI-usage: none Signed-off-by: Gabe Goodhart [email protected]

• fix(mtmd): Align feature_layer usage and naming everywhere

Branch: GraniteSpeechPlus AI-usage: none Signed-off-by: Gabe Goodhart [email protected]

• style: Use fstring for log

Signed-off-by: Gabe Goodhart [email protected]

Co-authored-by: Xuan-Son Nguyen [email protected]

Co-authored-by: Xuan-Son Nguyen [email protected]