openh264/* upgrade to conan v2

[Nomalah]

Specify library name and version: openh264/*

Upgrade openh264 to conan v2

---

• I've read the guidelines for contributing.
• I've followed the PEP8 style guides for Python code in the recipes.
• I've used the latest Conan client version.
• I've tried at least one configuration locally with the conan-center hook activated.

[Nomalah]

(also added v2.3.1)

[prince-chrismc]

Thank you so much for adding the patch fields just would like to change them to match the docs.

I believe they are all about fixes for different system and they should be type portability

Please let me know if that's not correct:)

[prince-chrismc]

This counts towards #12888 🚀 amazing contribution

[conan-center-bot]

Conan v1 pipeline

All green in build 8 (9f6d17507e8336393c6cf560666cbd9b2cb9eae0):

• openh264/2.1.1@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  ERROR: Error loading conanfile at '/home/conan/w/prod_cci_PR-13849/recipes/openh264/all/conanfile.py': Unable to load conanfile in /home/conan/w/prod_cci_PR-13849/recipes/openh264/all/conanfile.py
    File "<frozen importlib._bootstrap_external>", line 728, in exec_module
    File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
    File "/home/conan/w/prod_cci_PR-13849/recipes/openh264/all/conanfile.py", line 2, in <module>
      from conans import tools
  ImportError: cannot import name 'tools' from 'conans' (/opt/pyenv/versions/3.7.13/lib/python3.7/site-packages/conans/__init__.py)
  

• openh264/1.7.0@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  ERROR: Error loading conanfile at '/home/conan/w/prod_cci_PR-13849/recipes/openh264/all/conanfile.py': Unable to load conanfile in /home/conan/w/prod_cci_PR-13849/recipes/openh264/all/conanfile.py
    File "<frozen importlib._bootstrap_external>", line 728, in exec_module
    File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
    File "/home/conan/w/prod_cci_PR-13849/recipes/openh264/all/conanfile.py", line 2, in <module>
      from conans import tools
  ImportError: cannot import name 'tools' from 'conans' (/opt/pyenv/versions/3.7.13/lib/python3.7/site-packages/conans/__init__.py)
  

• openh264/2.3.1@:
  All packages built successfully! (All logs)

  🔸 Informative: This recipe is not ready for Conan v2

  _{We have started the migration process to Conan v2 and exporting recipes successfully will be required in the future.
  This is just an informative note to gain awareness about the process, no need to take any action. The plan is to enforce smaller steps that are easier to fix and, eventually, this conan export step will work.
  See the recipe migration guide to know more about the changes required.}

  ERROR: Error loading conanfile at '/home/conan/w/prod_cci_PR-13849/recipes/openh264/all/conanfile.py': Unable to load conanfile in /home/conan/w/prod_cci_PR-13849/recipes/openh264/all/conanfile.py
    File "<frozen importlib._bootstrap_external>", line 728, in exec_module
    File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
    File "/home/conan/w/prod_cci_PR-13849/recipes/openh264/all/conanfile.py", line 2, in <module>
      from conans import tools
  ImportError: cannot import name 'tools' from 'conans' (/opt/pyenv/versions/3.7.13/lib/python3.7/site-packages/conans/__init__.py)