openmvg: add v2.1, avoid patching, improve OpenMP support

[valgur]

https://github.com/openMVG/openMVG/releases/tag/v2.1

A decent portion of the patching was avoidable by simply providing the necessary CMake vars via conan_deps.cmake loaded as a CMake project include.

• Resolves openmvg: use libpng version range, bump deps #23129.

[conan-center-bot]

Conan v1 pipeline ❌

Failure in build 3 (32e376682f9e40f6773c0191118dc32a93c3a70d):

• openmvg/2.1:
  Didn't run or was cancelled before finishing

• openmvg/2.0:
  Error running command conan info openmvg/2.0@#54ee5c5543a1ba49471530ff5de53897 --json {jsonName} -pr {profileName}:

  [settings]
  arch=x86_64
  build_type=Release
  compiler=gcc
  compiler.libcxx=libstdc++11
  compiler.version=5
  os=Linux
  [options]
  openmvg:shared=False
  
  ...
  ERROR: Failed requirement 'coin-clp/1.17.9' from 'openmvg/2.0'
  ERROR: Unable to find 'coin-clp/1.17.9' in remotes
  

---

^{Note: To save resources, CI tries to finish as soon as an error is found. For this reason you might find that not all the references have been launched or not all the configurations for a given reference. Also, take into account that we cannot guarantee the order of execution as it depends on CI workload and workers availability.}

---

Conan v2 pipeline ❌

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

The v2 pipeline failed. Please, review the errors and note this is required for pull requests to be merged. In case this recipe is still not ported to Conan 2.x, please, ping @conan-io/barbarians on the PR and we will help you.

Failure in build 3 (32e376682f9e40f6773c0191118dc32a93c3a70d):

• openmvg/2.1:
  Error running command conan graph info --requires openmvg/2.1@#4165c4eae43a716fc657ee0654fba7b4 --build openmvg/2.1@#4165c4eae43a716fc657ee0654fba7b4 -f json -pr:h /home/conan/workspace/prod-v2/bsr/60020/fadab/profile_linux_11_libstdcpp11_17_gcc_release_64.-shared-False.txt -pr:b /home/conan/workspace/prod-v2/bsr/60020/fadab/profile_linux_11_libstdcpp11_17_gcc_release_64..txt:

  ======== Computing dependency graph ========
  cereal/1.3.2: Not found in local cache, looking in remotes...
  cereal/1.3.2: Checking remote: conan-center
  cereal/1.3.2: Downloaded recipe revision b94802e904e1129e7fdb46d9bff5321d
  ceres-solver/2.2.0: Not found in local cache, looking in remotes...
  ceres-solver/2.2.0: Checking remote: conan-center
  ceres-solver/2.2.0: Downloaded recipe revision ffe493f7be8e4e680694d8c2fd1ea9c8
  eigen/3.4.0: Not found in local cache, looking in remotes...
  eigen/3.4.0: Checking remote: conan-center
  eigen/3.4.0: Downloaded recipe revision 2e192482a8acff96fe34766adca2b24c
  cmake/3.30.0: Not found in local cache, looking in remotes...
  cmake/3.30.0: Checking remote: conan-center
  cmake/3.30.0: Downloaded recipe revision b93985853f6298c398c76dd4c2ac02a2
  coin-clp/1.17.9: Not found in local cache, looking in remotes...
  coin-clp/1.17.9: Checking remote: conan-center
  coin-clp/1.17.9: Checking remote: c3i_PR-v2-23836
  Graph root
      cli
  Requirements
      cereal/1.3.2#b94802e904e1129e7fdb46d9bff5321d - Downloaded (conan-center)
      ceres-solver/2.2.0#ffe493f7be8e4e680694d8c2fd1ea9c8 - Downloaded (conan-center)
      eigen/3.4.0#2e192482a8acff96fe34766adca2b24c - Downloaded (conan-center)
      openmvg/2.1#4165c4eae43a716fc657ee0654fba7b4 - Cache
  Build requirements
      cmake/3.30.0#b93985853f6298c398c76dd4c2ac02a2 - Downloaded (conan-center)
  Resolved version ranges
      cmake/[>=3.16 <4]: cmake/3.30.0
  ERROR: Package 'coin-clp/1.17.9' not resolved: Unable to find 'coin-clp/1.17.9' in remotes.
  

• openmvg/2.0:
  Didn't run or was cancelled before finishing

---

^{Note: To save resources, CI tries to finish as soon as an error is found. For this reason you might find that not all the references have been launched or not all the configurations for a given reference. Also, take into account that we cannot guarantee the order of execution as it depends on CI workload and workers availability.}