GPU: Possibility to use GPU RTC with caching and multiple GPUs from dpl-workflow.sh and unrelated fixes

[davidrohr]

No description provided.

[github-actions]

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[alibuild]

Error while checking build/O2/fullCI for f0d24c0 at 2024-04-22 14:45:

## sw/BUILD/O2-latest/log
c++: error: unrecognized command-line option '--rtlib=compiler-rt'
c++: error: unrecognized command-line option '--rtlib=compiler-rt'
"/sw/SOURCES/O2/13063-slc8_x86-64/0/GPU/GPUTracking/Definitions/GPUSettingsList.h", line 280: error: 
/sw/SOURCES/O2/13063-slc8_x86-64/0/GPU/GPUTracking/Definitions/GPUSettingsList.h:280:27: error: use of undeclared identifier 'std'
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2/fullCI for 21af21e at 2024-04-22 15:46:

## sw/BUILD/O2-latest/log
c++: error: unrecognized command-line option '--rtlib=compiler-rt'
c++: error: unrecognized command-line option '--rtlib=compiler-rt'
"/sw/SOURCES/O2/13063-slc8_x86-64/0/GPU/GPUTracking/Definitions/GPUSettingsList.h", line 280: error: 
/sw/SOURCES/O2/13063-slc8_x86-64/0/GPU/GPUTracking/Definitions/GPUSettingsList.h:280:27: error: use of undeclared identifier 'std'
ninja: build stopped: subcommand failed.

Full log here.