Use ${Python3_EXECUTABLE} in YT custom-runs

Use  in YT custom-runs
commit_hash:3a9e630b46d1d63a286ae18ce0e6d8fc680fe2ef

Author: dimdim1177

build/conf/project_specific/yt.conf

@@ -1,5 +1,5 @@
 macro GENERATE_YT_RECORD(Yaml, OUTPUT_INCLUDES[]) {
     .CMD=${tool:"yt/yt/tools/record_codegen"} --input ${input:Yaml} --output-root $ARCADIA_BUILD_ROOT --output-cpp ${output;norel;noext;suf=.record.cpp:Yaml} ${hide;output;norel;noext;suf=.record.h:Yaml} ${pre=--output-include :OUTPUT_INCLUDES} ${hide;output_include:OUTPUT_INCLUDES} ${hide;output_include:"yt/yt/client/table_client/record_codegen_deps.h"} ${hide;kv:"p RC"}
-    .SEM=custom_runs-ITEM && custom_runs-outputs ${output;norel;noext;suf=.record.cpp:Yaml} ${output;norel;noext;suf=.record.h:Yaml} && custom_runs-depends ${input:Yaml} ${input:"yt/yt/tools/record_codegen/__main__.py"} ${input:"yt/python/yt/record_codegen_helpers/__init__.py"} && custom_runs-env "PYTHONPATH=$ENV{PYTHONPATH}:${ARCADIA_ROOT}/yt/python/yt" && custom_runs-command python3 ${input:"yt/yt/tools/record_codegen/__main__.py"} --input ${input:Yaml} --output-root $ARCADIA_BUILD_ROOT --output-cpp ${output;norel;noext;suf=.record.cpp:Yaml} ${pre=--output-include :OUTPUT_INCLUDES} ${hide;output;norel;noext;suf=.record.h:Yaml} && custom_runs-cmake_packages-ITEM && custom_runs-cmake_packages-name Python3
+    .SEM=custom_runs-ITEM && custom_runs-outputs ${output;norel;noext;suf=.record.cpp:Yaml} ${output;norel;noext;suf=.record.h:Yaml} && custom_runs-depends ${input:Yaml} ${input:"yt/yt/tools/record_codegen/__main__.py"} ${input:"yt/python/yt/record_codegen_helpers/__init__.py"} && custom_runs-env "PYTHONPATH=$ENV{PYTHONPATH}:${ARCADIA_ROOT}/yt/python/yt" && custom_runs-command ${Python3_EXECUTABLE} ${input:"yt/yt/tools/record_codegen/__main__.py"} --input ${input:Yaml} --output-root $ARCADIA_BUILD_ROOT --output-cpp ${output;norel;noext;suf=.record.cpp:Yaml} ${pre=--output-include :OUTPUT_INCLUDES} ${hide;output;norel;noext;suf=.record.h:Yaml} && custom_runs-cmake_packages-ITEM && custom_runs-cmake_packages-name Python3
     PEERDIR(yt/yt/client)
 }