Mass deletion of the space character next to the selected character

I would like the space characters to disappear to the left of the "|" and i would like to delete "{***}"

for example, I have such a text in the worksheet. The problem is that it's 5000 lines.

dlga_start:blocked_agent |This person seems busy. Maybe I should move on...{***}

the text in the rows may have a different number of columns compared to the others.

should look like: dlga_start:blocked_agent|This person seems busy. Maybe I should move on...

how to solve this problem the easiest way?
(with the exception of manual correction)

Hi, welcome to the forum

Maybe try this approach? Do it separately for each "replace"
highlight your range
press CTRL H (find/replace)
Find *| (I copied this from your actual data - *space*|)
Replace | (I used the same "copy", and removed the leading space)

Repeat this, but use
Find ...{***}
Replace ...

Happy to help