extend the vcpkg cache pattern to remaining Dockerfiles

Author: qrkourier

.github/actions/openziti-tunnel-build-action/redhat-8/Dockerfile

@@ -40,6 +40,7 @@ RUN curl -sSfL https://cmake.org/files/v${CMAKE_VERSION%.*}/cmake-${CMAKE_VERSIO
 
 ENV VCPKG_ROOT=/usr/local/vcpkg
 # this must be set on arm. see https://learn.microsoft.com/en-us/vcpkg/users/config-environment#vcpkg_force_system_binaries
+ENV VCPKG_BINARY_SOURCES="clear;files,/github/workspace/vcpkg_cache,readwrite"
 ENV VCPKG_FORCE_SYSTEM_BINARIES=yes
 
 RUN cd /usr/local \

.github/actions/openziti-tunnel-build-action/ubuntu-20.04/Dockerfile

@@ -54,6 +54,7 @@ RUN curl -sSfL https://cmake.org/files/v${CMAKE_VERSION%.*}/cmake-${CMAKE_VERSIO
     && rm cmake.sh
 
 ENV VCPKG_ROOT=/usr/local/vcpkg
+ENV VCPKG_BINARY_SOURCES="clear;files,/github/workspace/vcpkg_cache,readwrite"
 # this must be set on arm. see https://learn.microsoft.com/en-us/vcpkg/users/config-environment#vcpkg_force_system_binaries
 ENV VCPKG_FORCE_SYSTEM_BINARIES=yes
 

.github/actions/openziti-tunnel-build-action/ubuntu-22.04/Dockerfile

@@ -59,6 +59,7 @@ RUN curl -sSfL "https://cmake.org/files/v${CMAKE_VERSION%.*}/cmake-${CMAKE_VERSI
     && rm cmake.sh
 
 ENV VCPKG_ROOT=/usr/local/vcpkg
+ENV VCPKG_BINARY_SOURCES="clear;files,/github/workspace/vcpkg_cache,readwrite"
 # this must be set on arm. see https://learn.microsoft.com/en-us/vcpkg/users/config-environment#vcpkg_force_system_binaries
 ENV VCPKG_FORCE_SYSTEM_BINARIES=yes