Add unit tests for HIST_count_wksp

The following tests are included:
- Empty input scenario test.
- Workspace size and alignment tests.
- Symbol out-of-range tests.
- Cover multiple input sizes, vary permitted maximum symbol
  values, and include diverse symbol distributions.

These tests verifies count table correctness, maxSymbolValuePtr
updates, and error-handling paths. It enables automated regression
of core histogram logic as well.

.github/workflows/dev-short-tests.yml

@@ -435,6 +435,8 @@ jobs:
         make clean
         LDFLAGS="-static" CC=$XCC QEMU_SYS=$XEMU make -j check
         LDFLAGS="-static" CC=$XCC QEMU_SYS=$XEMU make -j -C tests test-cli-tests
+        CFLAGS="-march=armv8.2-a+sve2" LDFLAGS="-static" CC=$XCC QEMU_SYS=$XEMU make -j check
+        CFLAGS="-march=armv8.2-a+sve2" LDFLAGS="-static" CC=$XCC QEMU_SYS=$XEMU make -j -C tests test-cli-tests
 # This test is only compatible with standard libraries that support BTI (Branch Target Identification).
 # Unfortunately, the standard library provided on Ubuntu 24.04 does not have this feature enabled.
 #        make clean