[qt][5.x] Provide all relocation information in qt.conf

[Minimonium]

Specify library name and version: qt/5.x

Since plugins and such are relocated inside the current qt.conf is insufficient. Possibly should resolve #4839, needs more information.

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• 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.

[conan-center-bot]

config.yml syntax error in build 1:

Only one library can be changed in the same PR: [qt/5.x.x, qt/6.x.x]

[conan-center-bot]

Failure in build 2 (38ee2123d4e68eb15794cd7c6b2f4ccc87ff6c06):

• qt/5.15.2@:
  An unexpected error happened and has been reported

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^{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.}

[ericLemanissier]

Thanks !

[conan-center-bot]

All green in build 3 (38ee2123d4e68eb15794cd7c6b2f4ccc87ff6c06):

• qt/5.15.2@:
  All packages built successfully! (All logs)