libwebp: remove old versions

[mayeut]

Specify library name and version: libwebp/all

Drop support for versions not used in up-to-date recipes.
Per https://github.com/conan-io/conan-center-index/blob/master/docs/adding_packages/sources_and_patches.md#removing-old-versions, 1.1.0 is kept as well although unused by up-to-date recipes.

downstream recipes:
dcmtk => removed or indirect
dlib => 1.3.1
ffmpeg => 1.3.1
freeimage => 1.3.1
gdal => 1.3.1
imagemagick => 1.2.0, #18429 bumps to 1.3.1
itk => removed or indirect
leptonica => 1.3.1
libgeotiff => removed or indirect
librasterlite2 => 1.3.1
libtiff => 1.3.1
libvips => 1.3.0, #18453 bumps to 1.3.1
opencv => removed or indirect
openimageio => 1.3.1
osgearth => 1.3.1
podofo => removed or indirect
proj => removed or indirect
sail => 1.3.1
sdl_image => 1.3.1
tesseract => removed or indirect

update 2023-08-19:

conan-center-index % grep -r '"libwebp/' recipes | grep -v '/1.3.1' 
recipes/libvips/all/conanfile.py:     self.requires("libwebp/1.3.0")
recipes/imagemagick/all/conanfile.py: self.requires("libwebp/1.2.0")

---

• I've read the contributing guidelines.
• I've used a recent Conan client version close to the currently deployed.
• I've tried at least one configuration locally with the conan-center hook activated.

[AbrilRBS]

Thanks a lot for your contribution! I think it could be nice to have the 1.2.0 and 1.2.2 dependants bumped, I'll get to it, link the PRs to this one, and we can update it to remove even more versions! And thanks to you and your great PR description, I know exactly which PRs to process :)

[mayeut]

I'll update the description with links to each PR

[AbrilRBS]

Thanks a lot! I'll prioritize reviewing those on my side to get this moving asap :)

[AbrilRBS]

Hi @mayeut thanks a lot for your patience, I'm back from my holiday, will try to finally get the last remaining PRs merged soon :)

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 9 (06be5d631d80ecbd81f46984f9227c5f1a031383):

• libwebp/1.3.1:
  All packages built successfully! (All logs)

• libwebp/1.3.2:
  All packages built successfully! (All logs)

• libwebp/1.2.4:
  All packages built successfully! (All logs)

• libwebp/1.1.0:
  All packages built successfully! (All logs)

---

Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 8 (06be5d631d80ecbd81f46984f9227c5f1a031383):

• libwebp/1.2.4:
  All packages built successfully! (All logs)

• libwebp/1.1.0:
  All packages built successfully! (All logs)

• libwebp/1.3.1:
  All packages built successfully! (All logs)

• libwebp/1.3.2:
  All packages built successfully! (All logs)