Static L0 Loader Support

[nrspruit]

Static Loader Support.

This support has a few conditions:

1. zes/ze driver split is not supported without this version of the loader so backwards compatibility for different lists of drivers for ze/zes init is not supported if using the static lib due to needing to modify the loader's context. zes/ze driver list will be the same.
2. As of this version of the loader, all symbols read between the static loader and the dynamic loader must remain ABI compatible ie all apis exported in source/loader/ze_loader_api.h now must be abi compatible.

[nrspruit]

example output:
scss_dev@nuc612dut2:~/level-zero-tests/build$ ./output/test_init_sysman
Context created static
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from SysmanInitTests
[ RUN ] SysmanInitTests.GivenCoreNotInitializedWhenSysmanInitializedThenzesDriverGetWorks
Context created context lib dynamic
Context created dynamic
loader created context lib dynamic
calling loader init static
ZE_LOADER_DEBUG_TRACE:Using Loader Library Path:
ZE_LOADER_DEBUG_TRACE:Loading Driver libze_intel_gpu.so.1
ZE_LOADER_DEBUG_TRACE:Loading Driver libze_intel_gpu_legacy1.so.1
ZE_LOADER_DEBUG_TRACE:Load Library of libze_intel_gpu_legacy1.so.1 failed with libze_intel_gpu_legacy1.so.1: cannot open shared object file: No such file or directory
ZE_LOADER_DEBUG_TRACE:Loading Driver libze_intel_vpu.so.1
ZE_LOADER_DEBUG_TRACE:Load Library of libze_intel_vpu.so.1 failed with libze_intel_vpu.so.1: cannot open shared object file: No such file or directory
ZE_LOADER_DEBUG_TRACE:Loading Driver libze_intel_npu.so.1
ZE_LOADER_DEBUG_TRACE:Load Library of libze_intel_npu.so.1 failed with libze_intel_npu.so.1: cannot open shared object file: No such file or directory
ZE_LOADER_DEBUG_TRACE:Tracing Layer Library Path: libze_tracing_layer.so.1
done loading functions
zelLoaderGetContext
calling static loader ddi init
ZE_LOADER_DEBUG_TRACE:check_drivers(flags=0(ZE_INIT_ALL_DRIVER_TYPES_ENABLED))
ZE_LOADER_DEBUG_TRACE:init driver libze_intel_gpu.so.1 zesInit(0(ZE_INIT_ALL_DRIVER_TYPES_ENABLED)) returning ZE_RESULT_SUCCESS
[ OK ] SysmanInitTests.GivenCoreNotInitializedWhenSysmanInitializedThenzesDriverGetWorks (29 ms)
[----------] 1 test from SysmanInitTests (29 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test suite ran. (29 ms total)
[ PASSED ] 1 test.
loader destroyed context lib dynamic
Context destroyed context lib dynamic
scss_dev@nuc612dut2:~/level-zero-tests/build$ ldd ./output/test_init_sysman
linux-vdso.so.1 (0x00007ffc7d5d8000)
libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f1d4a200000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f1d4a519000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f1d4a922000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f1d49e00000)
/lib64/ld-linux-x86-64.so.2 (0x00007f1d4a958000)

[lisanna-dettwyler]

Just a couple small comments from looking at it briefly

[ilya-lavrenov]

Issue #141