StatelessTags component memory leaks in edit mode

[itisAliRH]

Describe the bug
client/src/components/TagsMultiselect/StatelessTags.vue has significant performance issues in edit mode (not disabled) when rendered more than a few times on a page.

ref: #16607 and #17219

Galaxy Version and/or server at which you observed the bug
Commit: 4e33216

To Reproduce
Steps to reproduce the behavior:

1. Go to /datasets/list with a large number of items (or any other pages using StatelessTags)
2. Try scrolling or add/delete tags

[ElectronicBlueberry]

Update on the memory leak:

• the leak only occurs when the VueMultiselect component is rendered
• the leak only occurs if all items in the list have no tags. As soon as one item has at least one tag, it stabilizes, which explains while I could not reproduce it before

[itisAliRH]

#17331 fixed this issue!