[llvm] [SPIR-V] Improve implementation of the duplicates tracker's storage (PR #95958)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-x86_64-debian` running on `lldb-x86_64-debian` while building `llvm` at step 6 "test".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/162/builds/323

Here is the relevant piece of the build log for the reference:
```
Step 6 (test) failure: build (failure)
...
PASS: lldb-api :: functionalities/data-formatter/data-formatter-stl/generic/list/TestDataFormatterGenericList.py (66 of 2613)
PASS: lldb-api :: lang/cpp/stl/TestSTL.py (67 of 2613)
PASS: lldb-api :: tools/lldb-server/TestGdbRemoteExitCode.py (68 of 2613)
PASS: lldb-api :: functionalities/limit-debug-info/TestLimitDebugInfo.py (69 of 2613)
PASS: lldb-api :: tools/lldb-server/TestGdbRemoteSingleStep.py (70 of 2613)
PASS: lldb-api :: functionalities/thread/main_thread_exit/TestMainThreadExit.py (71 of 2613)
PASS: lldb-api :: tools/lldb-server/libraries-svr4/TestGdbRemoteLibrariesSvr4Support.py (72 of 2613)
PASS: lldb-api :: commands/statistics/basic/TestStats.py (73 of 2613)
PASS: lldb-api :: commands/watchpoints/hello_watchlocation/TestWatchLocation.py (74 of 2613)
PASS: lldb-api :: tools/lldb-dap/restart/TestDAP_restart.py (75 of 2613)
XFAIL: lldb-api :: functionalities/thread/create_during_step/TestCreateDuringStep.py (76 of 2613)
PASS: lldb-api :: commands/gui/breakpoints/TestGuiBreakpoints.py (77 of 2613)
PASS: lldb-api :: functionalities/inferior-crashing/TestInferiorCrashingStep.py (78 of 2613)
PASS: lldb-api :: functionalities/data-formatter/data-formatter-stl/libcxx/string/simulator/TestDataFormatterLibcxxStringSimulator.py (79 of 2613)
PASS: lldb-api :: functionalities/recursion/TestValueObjectRecursion.py (80 of 2613)
PASS: lldb-api :: types/TestCharTypeExpr.py (81 of 2613)
PASS: lldb-api :: lang/cpp/incomplete-types/TestCppIncompleteTypes.py (82 of 2613)
PASS: lldb-api :: lang/cpp/template/TestTemplateArgs.py (83 of 2613)
PASS: lldb-api :: commands/watchpoints/multiple_threads/TestWatchpointMultipleThreads.py (84 of 2613)
PASS: lldb-api :: functionalities/data-formatter/data-formatter-stl/libstdcpp/iterator/TestDataFormatterStdIterator.py (85 of 2613)
PASS: lldb-api :: tools/lldb-dap/breakpoint/TestDAP_setBreakpoints.py (86 of 2613)
PASS: lldb-api :: functionalities/inferior-crashing/recursive-inferior/TestRecursiveInferior.py (87 of 2613)
PASS: lldb-api :: types/TestLongTypesExpr.py (88 of 2613)
PASS: lldb-api :: types/TestIntegerType.py (89 of 2613)
PASS: lldb-api :: functionalities/thread/num_threads/TestNumThreads.py (90 of 2613)
PASS: lldb-api :: functionalities/step-vrs-interrupt/TestStepVrsInterruptTimeout.py (91 of 2613)
PASS: lldb-api :: api/listeners/TestListener.py (92 of 2613)
PASS: lldb-api :: lang/c/bitfields/TestBitfields.py (93 of 2613)
PASS: lldb-api :: functionalities/gdb_remote_client/TestRegDefinitionInParts.py (94 of 2613)
PASS: lldb-api :: functionalities/tail_call_frames/disambiguate_call_site/TestDisambiguateCallSite.py (95 of 2613)
PASS: lldb-api :: functionalities/inline-stepping/TestInlineStepping.py (96 of 2613)
PASS: lldb-api :: functionalities/inferior-assert/TestInferiorAssert.py (97 of 2613)
PASS: lldb-api :: functionalities/data-formatter/data-formatter-stl/generic/deque/TestDataFormatterGenericDeque.py (98 of 2613)
PASS: lldb-api :: commands/command/script/TestCommandScript.py (99 of 2613)
PASS: lldb-api :: tools/lldb-server/vCont-threads/TestPartialResume.py (100 of 2613)
PASS: lldb-api :: functionalities/data-formatter/data-formatter-stl/generic/multimap/TestDataFormatterGenericMultiMap.py (101 of 2613)
PASS: lldb-api :: functionalities/data-formatter/data-formatter-stl/libstdcpp/map/TestDataFormatterStdMap.py (102 of 2613)
PASS: lldb-api :: functionalities/breakpoint/breakpoint_command/TestBreakpointCommand.py (103 of 2613)
PASS: lldb-api :: commands/expression/static-initializers/TestStaticInitializers.py (104 of 2613)
PASS: lldb-api :: tools/lldb-server/TestGdbRemoteRegisterState.py (105 of 2613)
PASS: lldb-api :: qemu/TestQemuLaunch.py (106 of 2613)
PASS: lldb-api :: functionalities/thread/concurrent_events/TestConcurrentManyBreakpoints.py (107 of 2613)
PASS: lldb-api :: python_api/type/TestTypeList.py (108 of 2613)
PASS: lldb-api :: tools/lldb-dap/console/TestDAP_console.py (109 of 2613)
PASS: lldb-api :: functionalities/gdb_remote_client/TestXMLRegisterFlags.py (110 of 2613)
PASS: lldb-api :: functionalities/thread/concurrent_events/TestConcurrentDelayedCrashWithBreakpointSignal.py (111 of 2613)
PASS: lldb-api :: functionalities/tail_call_frames/ambiguous_tail_call_seq2/TestAmbiguousTailCallSeq2.py (112 of 2613)
PASS: lldb-api :: functionalities/step-avoids-no-debug/TestStepNoDebug.py (113 of 2613)
PASS: lldb-api :: lang/cpp/namespace_definitions/TestNamespaceDefinitions.py (114 of 2613)

```

https://github.com/llvm/llvm-project/pull/95958