Allow showing progress updates on arbitrary components

[abidlabs]

Closes: #3714, this is something that I've found quite needed in my own gradio apps as well.

Test code:

import gradio as gr
import time

def fake():
    time.sleep(1)
    return ["Done"]*2

with gr.Blocks() as demo:
    with gr.Row():
        b = gr.Button()
        t1 = gr.Textbox("Both of these will update...")
        t2 = gr.Textbox("...but only this one will show a loading indicator")

    b.click(fake, None, [t1, t2], show_progress_on=t2, show_progress="minimal")

demo.launch()

The frontend changes are hacky and I'm almost certain there's a better way, but could use some help with making the changes work with the status store that we use, cc @aliabid94 @pngwn perhaps.

[gradio-pr-bot]

🪼 branch checks and previews

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---

Install Gradio from this PR

pip install https://gradio-pypi-previews.s3.amazonaws.com/5a4e989918f79f53cf66e6e5e2d18456538975ee/gradio-5.15.0-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@5a4e989918f79f53cf66e6e5e2d18456538975ee#subdirectory=client/python"

Install Gradio JS Client from this PR

npm install https://gradio-npm-previews.s3.amazonaws.com/5a4e989918f79f53cf66e6e5e2d18456538975ee/gradio-client-1.11.0.tgz

Use Lite from this PR

<script type="module" src="https://gradio-lite-previews.s3.amazonaws.com/5a4e989918f79f53cf66e6e5e2d18456538975ee/dist/lite.js""></script>

[gradio-pr-bot]

🦄 change detected

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@gradio/client	minor
@gradio/core	minor
gradio	minor

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Allow showing progress updates on arbitrary components

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[abidlabs]

Ah nice thanks @aliabid94. Simpler than I expected.