develop revert source to clang-format version 11 (#293)

* OESS-98 convert plugin option to FetchContent, add tests

* Fixes for pkcfg files because of plugin option

* OESS-98 fix tools test for plugins

* Keep doxygen comments under 100 chars long - format hint

* Whitespace

* HDFFV-11144 - Reclassify CMake messages

* HDFFV-11099/11100 added help text

* Reworked switch statement to compare string instead

* Fix typo

* Update CDash mode

* Correct name of threadsafe

* Correct option name

* Undo accidental commit

* Note LLVM 10 to 11 format default changes

* Update format plugin

* Undo clang-format version 11 changes

* One more correction

.github/workflows/clang-format-check.yml

@@ -8,7 +8,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Run clang-format style check for C programs.
-      uses: DoozyX/clang-format-lint-action@v0.10
+      uses: DoozyX/clang-format-lint-action@v0.11
       with:
         source: '.'
         extensions: 'c,h,cpp,hpp'