[clang-tools-extra] [clangd] Clean formatting modernize-use-override (PR #81435)

[Kevin Joseph via cfe-commits]

kevinjoseph1995 wrote:

> Small fix in release notes needed. If with this change tests are passing, then it's looking fine for me.

ninja check-clang-tools reports the following:
```
Total Discovered Tests: 2813
Unsupported      :    7 (0.25%)
Passed           : 2804 (99.68%)
Expectedly Failed:    2 (0.07%)
```
And all of the ClangdTests pass as well:
```
[==========] 1232 tests from 179 test suites ran. (86642 ms total)
[  PASSED  ] 1232 tests.
```

https://github.com/llvm/llvm-project/pull/81435