SimSYCL is now thread-safe; remove workarounds #4778

Job	Run time
read-build-matrix	8s
clang-tidy	1m 48s
build-and-test (dpcpp, ad494e9d, false, 22.04, intel, Debug)	3m 28s
build-and-test (dpcpp, ad494e9d, false, 22.04, intel, Release)	3m 1s
build-and-test (dpcpp, latest, true, 24.04, intel, Debug)	4m 29s
build-and-test (dpcpp, latest, true, 24.04, intel, Release)	3m 27s
build-and-test (acpp, v24.06.0, false, 22.04, nvidia, Debug)	3m 55s
build-and-test (acpp, v24.06.0, false, 22.04, nvidia, Release)	2m 57s
build-and-test (acpp, latest, true, 24.04, nvidia, Debug)	5m 1s
build-and-test (acpp, latest, true, 24.04, nvidia, Release)	10m 44s
build-and-test (simsycl, HEAD, true, 24.04, intel, Release)	2m 37s
build-and-test (simsycl, HEAD, true, 24.04, intel, Debug)	7m 59s
tag-latest-containers	0s
report	0s
	49m 34s

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