Fix vcpkg builds (#7702)

* Try to fix MSVC linker error related to lilv

* Remove temporary workaround

* Temporary debugging messages

* oops

* Temporary debugging

* Try to find FluidSynth using Config mode first

* Try again to fix lilv

* Fix FluidSynth installed with vcpkg on Windows

* Fix lilv from vcpkg

* Remove debug flag

* Fix for when lilv is not found (*-NOTFOUND evaluates to false)

* Use lowercase package name for lv2

* Try using only pkg_check_modules for lv2

* Use Lilv::lilv

* Add pkg-config guard back in

* Fix package name

Co-authored-by: Tres Finocchiaro <tres.finocchiaro@gmail.com>

* Fix Lilv_INCLUDE_DIRS

* Rename vcpkg cache key

---------

Co-authored-by: Tres Finocchiaro <tres.finocchiaro@gmail.com>

.github/workflows/build.yml

@@ -317,19 +317,13 @@ jobs:
         with:
           fetch-depth: 0
           submodules: recursive
-      - name: Update vcpkg (TEMPORARY)
-        run: |
-          cd $env:VCPKG_INSTALLATION_ROOT
-          git pull
-          .\bootstrap-vcpkg.bat
-        shell: pwsh
       - name: Cache vcpkg dependencies
         id: cache-deps
         uses: actions/cache@v3
         with:
-          key: vcpkg-x64-${{ hashFiles('vcpkg.json') }}
+          key: vcpkg-msvc-x86_64-${{ hashFiles('vcpkg.json') }}
           restore-keys: |
-            vcpkg-x64-
+            vcpkg-msvc-x86_64-
           path: build\vcpkg_installed
       - name: Cache ccache data
         uses: actions/cache@v3