remove: ASR and TTS models and components

Created by: IgnatovFedor

Removed ASR and TTS components based on NVIDIA NeMo.

Removed models:

• asr.json
• tts.json
• asr_tts.json

Removed components:

• base64_decode_bytesIO
• bytesIO_encode_base64
• nemo_asr
• nemo_tts