[rtaudio] Fix feature pulse compilation error (#38625)

Fix one of https://github.com/microsoft/vcpkg/issues/32398 issue.

Fixed the issue of prompting that pulse and pulse-simple cannot be found
when compiling feature pulse on Linux.
- [X] Changes comply with the [maintainer
guide](https://github.com/microsoft/vcpkg-docs/blob/main/vcpkg/contributing/maintainer-guide.md).
- [ ] ~~SHA512s are updated for each updated download.~~
- [ ] ~~The "supports" clause reflects platforms that may be fixed by
this new version.~~
- [ ] ~~Any fixed [CI
baseline](https://github.com/microsoft/vcpkg/blob/master/scripts/ci.baseline.txt)
entries are removed from that file.~~
- [ ] ~~Any patches that are no longer applied are deleted from the
port's directory.~~
- [X] The version database is fixed by rerunning `./vcpkg x-add-version
--all` and committing the result.
- [X] Only one version is added to each modified port's versions file.

Compile test pass with following triplets:
```
x64-windows
x64-linux
```
Usage test pass with following triplets:

```
x64-linux
```

ports/rtaudio/fix-pulse.patch

@@ -0,0 +1,28 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 8e021dc..6dbac46 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -149,9 +149,9 @@ endif()
+ # Pulse
+ if (RTAUDIO_API_PULSE)
+   set(NEED_PTHREAD ON)
+-  find_library(PULSE_LIB pulse)
+-  find_library(PULSESIMPLE_LIB pulse-simple)
+-  list(APPEND LINKLIBS ${PULSE_LIB} ${PULSESIMPLE_LIB})
++  find_package(PkgConfig)
++  pkg_check_modules(pulse-simple REQUIRED IMPORTED_TARGET libpulse-simple)
++  list(APPEND LINKLIBS PkgConfig::pulse-simple)
+   list(APPEND PKGCONFIG_REQUIRES "libpulse-simple")
+   list(APPEND API_DEFS "-D__LINUX_PULSE__")
+   list(APPEND API_LIST "pulse")
+@@ -323,6 +323,10 @@ file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/RtAudioConfig.cmake.in "@PACKAGE_INIT@\n"
+ if(NEED_PTHREAD)
+   file(APPEND ${CMAKE_CURRENT_BINARY_DIR}/RtAudioConfig.cmake.in "find_package(Threads REQUIRED)\n")
+ endif()
++if (RTAUDIO_API_PULSE)
++  file(APPEND ${CMAKE_CURRENT_BINARY_DIR}/RtAudioConfig.cmake.in "find_package(PkgConfig)\n")
++  file(APPEND ${CMAKE_CURRENT_BINARY_DIR}/RtAudioConfig.cmake.in "pkg_check_modules(pulse-simple REQUIRED IMPORTED_TARGET libpulse-simple)\n")
++endif()
+ 
+ file(APPEND ${CMAKE_CURRENT_BINARY_DIR}/RtAudioConfig.cmake.in "include(\${CMAKE_CURRENT_LIST_DIR}/RtAudioTargets.cmake)")
+ 

ports/rtaudio/portfile.cmake

@@ -4,6 +4,8 @@ vcpkg_from_github(
     REF ${VERSION}
     SHA512 085feb2673185460717ba45fc87254961e477823759e11281092c1ba13301303de1cd36aa9efeba0710cbf2c70f2e2f7f9e41173cf372ded528c41612b19acd5
     HEAD_REF master
+    PATCHES
+        fix-pulse.patch
 )
 
 string(COMPARE EQUAL "${VCPKG_CRT_LINKAGE}" "static" RTAUDIO_STATIC_MSVCRT)
@@ -14,13 +16,18 @@ vcpkg_check_features(OUT_FEATURE_OPTIONS FEATURE_OPTIONS
         alsa  RTAUDIO_API_ALSA
         pulse RTAUDIO_API_PULSE
 )
-
+set(PKG_OPT "")
+if("pulse" IN_LIST FEATURES)
+    vcpkg_find_acquire_program(PKGCONFIG)
+    set(PKG_OPT "-DPKG_CONFIG_EXECUTABLE=${PKGCONFIG}")
+endif()
 vcpkg_cmake_configure(
     SOURCE_PATH "${SOURCE_PATH}"
     OPTIONS
         -DRTAUDIO_STATIC_MSVCRT=${RTAUDIO_STATIC_MSVCRT}
         -DRTAUDIO_API_JACK=OFF
         ${FEATURE_OPTIONS}
+        ${PKG_OPT}
 )
 
 vcpkg_cmake_install()

ports/rtaudio/vcpkg.json

@@ -1,6 +1,7 @@
 {
   "name": "rtaudio",
   "version": "6.0.1",
+  "port-version": 1,
   "description": "A set of C++ classes that provide a common API for realtime audio input/output across Linux (native ALSA, JACK, PulseAudio and OSS), Macintosh OS X (CoreAudio and JACK), and Windows (DirectSound, ASIO and WASAPI) operating systems.",
   "homepage": "https://github.com/thestk/rtaudio",
   "license": null,
@@ -29,7 +30,10 @@
     },
     "pulse": {
       "description": "Build with PulseAudio backend",
-      "supports": "linux"
+      "supports": "linux",
+      "dependencies": [
+        "pulseaudio"
+      ]
     }
   }
 }

versions/baseline.json

@@ -7794,7 +7794,7 @@
     },
     "rtaudio": {
       "baseline": "6.0.1",
-      "port-version": 0
+      "port-version": 1
     },
     "rtlsdr": {
       "baseline": "2020-04-16",

versions/r-/rtaudio.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "07842f7b2096168243d97720d33ec5436b0d6365",
+      "version": "6.0.1",
+      "port-version": 1
+    },
     {
       "git-tree": "b97a9859776e7d23b21a9660e9b31e69fdb84185",
       "version": "6.0.1",