[SYCL][ESIMD] Add supported versions of raw_send APIs

[sarnex]

Some design decisions I made here:

1. Only add the versions with must-be-constant arguments as template parameters. The original versions had them as runtime parameters and it worked some times, but if the compiler can't optimize it, it will fail. It seems sane to me to only add the versions which are guaranteed to be correct.

2. Replace eot/sendc arguments with enums, we discussed this one and is hopefully not controversial

3. Move the intrinsics to supported and call the supported intrinsics in the experiemntal code just to prevent code duplication

Also, the histrogram_raw_send test doesn't even compile in HEAD, we didn't catch it because it requires gen9 and we don't test that anymore. It was doing something insane with execSize and once we made mask len == exec size it broke. They aren't even using the mask so just remove it to fix the test.

Manually verified both modified tests pass.

[v-klochkov]

We have the commend defining

/// @defgroup sycl_esimd_raw_send Raw send APIs.
/// Implements the \c send instruction to send messages to variaous components
/// of the Intel(R) processor graphics, as defined in the documentation at
/// https://01.org/sites/default/files/documentation/intel-gfx-prm-osrc-icllp-vol02a-commandreference-instructions_2.pdf

The reference there is obsolete/broke.
Can you please update it with something like:

  /// Click "Volume 2a: Command Reference: Instructions" at 
  /// https://www.intel.com/content/www/us/en/docs/graphics-for-linux/developer-reference/1-0/hardware-specs.html
  /// to get the definition and details of the 'send' instruction.

[v-klochkov]

@sarnex - please add a 'deprecated' message for "new"/constexpr version of raw_send/sends in experimental namespace.

[sarnex]

@v-klochkov Thanks for the review, all feedback should be addressed in the latest commit

[sarnex]

@intel/llvm-gatekeepers I think we are good to go on this one, thanks!