[4.x] Add option to prepend parameters to Glide urls

[rboonzaijer]

Add option to prepend parameters to Glide urls.

In addition to the 'append_original_filename', this option 'prepend_used_parameters' will prepend the used Glide parameters to the url. It will be appended before the hash, so the original filename at the end won't change (important for SEO).

On custom glide caches (S3 buckets) you can then see what kind of parameters have been used. This can be used by developers or QA to easily spot mistakes in the used Glide parameters.

If these parameters were given: format=webp, width=600, dpr=2, then this would be added to the url: fmwebp-w600-dpr2

Example:

<picture>
    <source type="image/webp" media="(min-width: 1024px)" srcset="
        {{ glide :src="asset" format="webp" width="600" dpr="1" }}{{ url }}{{ /glide }},
        {{ glide :src="asset" format="webp" width="600" dpr="2" }}{{ url }}{{ /glide }} 2x,
        {{ glide :src="asset" format="webp" width="600" dpr="3" }}{{ url }}{{ /glide }} 3x
    ">
    <source type="image/webp" media="(min-width: 768px)" srcset="
        {{ glide :src="asset" format="webp" width="1000" }}{{ url }}{{ /glide }},
        {{ glide :src="asset" format="webp" width="1500" }}{{ url }}{{ /glide }} 2x,
        {{ glide :src="asset" format="webp" width="2000" }}{{ url }}{{ /glide }} 3x
    ">
    <img src="{{ glide :src="asset" format="jpg" width="1000" }}{{ url }}{{ /glide }}">
</picture>

If we now set the 'prepend_used_parameters' to true, we can check if the urls have proper parameters.

Output:

<picture>
  <source type="image/webp" media="(min-width: 1024px)" srcset="
    https://***amazonaws.com/***/image.png/fmwebp-w600-dpr1-aaaz8ca37e84b301d3fdf219e04ac1e0/image.webp,
    https://***amazonaws.com/***/image.png/fmwebp-w600-dpr2-bbbz8ca37e84b301d3fdf219e04ac1e0/image.webp 2x,
    https://***amazonaws.com/***/image.png/fmwebp-w600-dpr3-cccz8ca37e84b301d3fdf219e04ac1e0/image.webp 3x
    ">
  <source type="image/webp" media="(min-width: 768px)" srcset="
    https://***amazonaws.com/***/image.png/fmwebp-w1000-dddz8ca37e84b301d3fdf219e04ac1e0/image.webp,
    https://***amazonaws.com/***/image.png/fmwebp-w1500-eeez8ca37e84b301d3fdf219e04ac1e0/image.webp 2x,
    https://***amazonaws.com/***/image.png/fmwebp-w2000-fffz8ca37e84b301d3fdf219e04ac1e0/image.webp 3x
    ">
  <img src="https://***amazonaws.com/***/image.png/fmjpg-w1000-gggz8ca37e84b301d3fdf219e04ac1e0/image.jpg">
</picture>

[jasonvarga]

Closing in favor of #9918