Unify target compile definitions

[sandro-elsweijer]

Describe your changes here:
The cmake system ad its own definitions for each target (t8code itself and each benchmark, test, tutorial and example).
This PR introduces a function which adds all relevant compile definitions to a target. This way everything in t8code is compiled the same way.

Furthermore, this PR renames the T8CODE_BUILD_PEDANTIC option into T8CODE_BUILD_WPEDANTIC so that it is in line with
T8CODE_BUILD_WALL
T8CODE_BUILD_WERROR

All these boxes must be checked by the reviewers before merging the pull request:

As a reviewer please read through all the code lines and make sure that the code is fully understood, bug free, well-documented and well-structured.

General

• The reviewer executed the new code features at least once and checked the results manually

• The code follows the t8code coding guidelines

• New source/header files are properly added to the Makefiles

• The code is well documented

• All function declarations, structs/classes and their members have a proper doxygen documentation

• All new algorithms and data structures are sufficiently optimal in terms of memory and runtime (If this should be merged, but there is still potential for optimization, create a new issue)

Tests

• The code is covered in an existing or new test case using Google Test

Github action

• The code compiles without warning in debugging and release mode, with and without MPI (this should be executed automatically in a github action)

• All tests pass (in various configurations, this should be executed automatically in a github action)

  If the Pull request introduces code that is not covered by the github action (for example coupling with a new library):

  • Should this use case be added to the github action?
  • If not, does the specific use case compile and all tests pass (check manually)

Scripts and Wiki

• If a new directory with source-files is added, it must be covered by the script/find_all_source_files.sh to check the indentation of these files.
• If this PR introduces a new feature, it must be covered in an example/tutorial and a Wiki article.

License

• The author added a BSD statement to doc/ (or already has one)

Tag Label

• The author added the patch/minor/major label in accordance to semantic versioning.

[lukasdreyer]

The compiler option for the others is called -Werror and -Wall compared to -pedantic

PR Overview

This PR unifies the compile definitions across targets by introducing a function to add all relevant compile definitions and renaming the pedantic build option for consistency.

• Updated CI workflow YAMLs to replace T8CODE_BUILD_PEDANTIC with T8CODE_BUILD_WPEDANTIC.
• Ensured consistent compile configuration flags across different build jobs.

Reviewed Changes

File	Description
.github/workflows/build_cmake_tarball.yml	Replaced T8CODE_BUILD_PEDANTIC with T8CODE_BUILD_WPEDANTIC.
.github/workflows/tests_cmake_t8code_api.yml	Replaced T8CODE_BUILD_PEDANTIC with T8CODE_BUILD_WPEDANTIC.
.github/workflows/tests_cmake_t8code.yml	Replaced T8CODE_BUILD_PEDANTIC with T8CODE_BUILD_WPEDANTIC.
.github/workflows/tests_cmake_t8code_linkage.yml	Replaced T8CODE_BUILD_PEDANTIC with T8CODE_BUILD_WPEDANTIC.
.github/workflows/tests_cmake_t8code_w_shipped_submodules.yml	Replaced T8CODE_BUILD_PEDANTIC with T8CODE_BUILD_WPEDANTIC.

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