[SYCL] PR 6 - Remove FPGA Attributes from SYCL FE

[premanandrao]

This removes the following attributes:

[[intel::loop_coalesce]]
[[intel::max_interleaving]]
[[intel::scheduler_target_fmax_mhz]]
[[intel::use_stall_enable_clusters]]

[premanandrao]

@intel/llvm-gatekeepers, any ideas about this failure in SYCL Pre Commit on Linux?

error: variable 'eventRetains' set but not used [-Werror,-Wunused-but-set-global]
8 | static size_t eventRetains = 0;
| ^

The failure is in a unittest mock_opencl/mock_opencl.cpp, but the code that is being flagged has been there for nearly a year. Did the diagnostic severity change recently?

[sarnex]

Not sure why it started failing now but a PR is open to fix it here #21814

[premanandrao]

Not sure why it started failing now but a PR is open to fix it here #21814

Thank you!

[KornevNikita]

@premanandrao is this ready?

[premanandrao]

@premanandrao is this ready?

Yes, the Jenkins failure seems unrelated.