[Preset] Add time-tests lit flag for PR presets

Author: shahmishal

utils/build-presets.ini

@@ -303,7 +303,7 @@ lldb-assertions
 [preset: buildbot_incremental_base]
 test
 validation-test
-lit-args=-v
+lit-args="-v --time-tests"
 
 compiler-vendor=apple
 
@@ -775,7 +775,7 @@ foundation
 libdispatch
 indexstore-db
 sourcekit-lsp
-lit-args=-v
+lit-args="-v --time-tests"
 
 dash-dash
 
@@ -1936,4 +1936,4 @@ mixin-preset=buildbot_linux
 debug-foundation
 
 [preset: buildbot_linux,foundation=release]
-mixin-preset=buildbot_linux
+mixin-preset=buildbot_linux