[clang-tools-extra] [clang-doc] fix paths by hard coding path to share (PR #98099)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-aarch64-global-isel` running on `linaro-clang-aarch64-global-isel` while building `clang-tools-extra` at step 13 "test-suite".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/125/builds/568

Here is the relevant piece of the build log for the reference:
```
Step 13 (test-suite) failure: test (failure)
...
size..init_array: 16 
size..interp: 27 
size..note.ABI-tag: 32 
size..plt: 704 
size..rela.dyn: 2304 
size..rela.plt: 1008 
size..rodata: 5626 
size..text: 43284 
**********
NOEXE: test-suite :: Bitcode/simd_ops/simd_ops_test_op_addhn_710.test (34 of 3424)
******************** TEST 'test-suite :: Bitcode/simd_ops/simd_ops_test_op_addhn_710.test' FAILED ********************
Executable '/home/tcwg-buildbot/worker/clang-aarch64-global-isel/test/sandbox/build/Bitcode/simd_ops/simd_ops_test_op_addhn_710' is missing
********************
NOEXE: test-suite :: Bitcode/simd_ops/simd_ops_test_op_cmeq_1056.test (35 of 3424)
******************** TEST 'test-suite :: Bitcode/simd_ops/simd_ops_test_op_cmeq_1056.test' FAILED ********************
Executable '/home/tcwg-buildbot/worker/clang-aarch64-global-isel/test/sandbox/build/Bitcode/simd_ops/simd_ops_test_op_cmeq_1056' is missing
********************
NOEXE: test-suite :: Bitcode/simd_ops/simd_ops_test_op_cmeq_1057.test (36 of 3424)
******************** TEST 'test-suite :: Bitcode/simd_ops/simd_ops_test_op_cmeq_1057.test' FAILED ********************
Executable '/home/tcwg-buildbot/worker/clang-aarch64-global-isel/test/sandbox/build/Bitcode/simd_ops/simd_ops_test_op_cmeq_1057' is missing
********************
NOEXE: test-suite :: Bitcode/simd_ops/simd_ops_test_op_cmeq_1055.test (37 of 3424)
******************** TEST 'test-suite :: Bitcode/simd_ops/simd_ops_test_op_cmeq_1055.test' FAILED ********************
Executable '/home/tcwg-buildbot/worker/clang-aarch64-global-isel/test/sandbox/build/Bitcode/simd_ops/simd_ops_test_op_cmeq_1055' is missing
********************
NOEXE: test-suite :: Bitcode/simd_ops/simd_ops_test_op_cmeq_1058.test (38 of 3424)
******************** TEST 'test-suite :: Bitcode/simd_ops/simd_ops_test_op_cmeq_1058.test' FAILED ********************
Executable '/home/tcwg-buildbot/worker/clang-aarch64-global-isel/test/sandbox/build/Bitcode/simd_ops/simd_ops_test_op_cmeq_1058' is missing
********************
PASS: test-suite :: Bitcode/simd_ops/simd_ops_test_op_abs_39.test (39 of 3424)
********** TEST 'test-suite :: Bitcode/simd_ops/simd_ops_test_op_abs_39.test' RESULTS **********
compile_time: 0.0000 
exec_time: 0.0352 
hash: "9ba6ba3666a92bc10bc9897897135faf" 
link_time: 0.0600 
size: 83328 
size..bss: 3160 
size..comment: 206 
size..data: 264 
size..data.rel.ro: 1200 
size..dynamic: 560 
size..dynstr: 568 
size..dynsym: 1152 
size..eh_frame: 1468 
size..eh_frame_hdr: 348 
size..fini: 16 
size..fini_array: 40 
size..gnu.hash: 28 
size..gnu.version: 96 

```

https://github.com/llvm/llvm-project/pull/98099