[OPENCL] Refactor ext functions caching

[omarahmed1111]

This PR is built on top of [OPENCL] Add UR handles to OPENCL adapter.

Intel/llvm testing

[codecov-commenter]

Codecov Report

Attention: 34 lines in your changes are missing coverage. Please review.

Comparison is base (78ef1ca) 14.82% compared to head (58ba98b) 12.72%.
Report is 11 commits behind head on main.

Files	Patch %	Lines
...e/common/umf_pools/disjoint_pool_config_parser.cpp	0.00%	15 Missing ⚠️
source/common/umf_helpers.hpp	0.00%	9 Missing ⚠️
source/common/logger/ur_logger_details.hpp	61.53%	5 Missing ⚠️
test/usm/usmPoolManager.cpp	0.00%	5 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1325      +/-   ##
==========================================
- Coverage   14.82%   12.72%   -2.10%     
==========================================
  Files         250      238      -12     
  Lines       36220    35338     -882     
  Branches     4094     4010      -84     
==========================================
- Hits         5369     4498     -871     
- Misses      30800    30836      +36     
+ Partials       51        4      -47     

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