Fix incorrect calc_word_indecies when used loras

[kruall]

Before saving the images, a prompt with undeleted lora:.* inserts was taken, although initially a prompt without them was provided. I removed the prompt override, and now the search for indexes is based on the correct prompt.

[kousw]

I understand this problem, but in webui the prompts given initially can change during batch generation due to a special notation.
Therefore, this implementation uses the actual prompts used from the generated images to eliminate the discrepancy.

However, it does not take into account the Lora situation, so I will check to see how it works.