Fix build in case no suitable OGRE is found

[peci1]

🦟 Bug fix

Summary

Trying to build Garden on Windows via conda results in a state where ogre is not found (conda provides 1.13, but gz-rendering wants 1.9). Due to the badly written if(), if ogre is not found, the whole build fails with:

--- stderr: gz-rendering7
CMake Warning at D:/programovani/ign5-ws/install/share/cmake/gz-cmake3/cmake3/FindGzOGRE.cmake:173 (find_package):
  Could not find a configuration file for package "OGRE" that is compatible
  with requested version "1.9".

  The following configuration files were considered but not accepted:

    D:/Programy/Conda/envs/ign5-ws/Library/CMake/OGREConfig.cmake, version: 13.4.4

Call Stack (most recent call first):
  D:/programovani/ign5-ws/install/share/cmake/gz-cmake3/cmake3/GzUtils.cmake:231 (find_package)
  CMakeLists.txt:78 (gz_find_package)


CMake Error at CMakeLists.txt:87 (if):
  if given arguments:

    "VERSION_GREATER_EQUAL" "1.10.0"

  Unknown arguments specified


---
Failed   <<< gz-rendering7 [4.59s, exited with code 1]

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov]

Codecov Report

Merging #726 (4f167f3) into gz-rendering7 (7e3371b) will not change coverage.
The diff coverage is n/a.

@@              Coverage Diff               @@
##           gz-rendering7     #726   +/-   ##
==============================================
  Coverage          74.14%   74.14%           
==============================================
  Files                164      164           
  Lines              14351    14351           
==============================================
  Hits               10641    10641           
  Misses              3710     3710           

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