project.config: copy TryBot labels across commit message edits

The Run-TryBot and TryBot-Result labels are used by the Go build system
for running tests. These tests are testing code changes across multiple
Go ports and environment configurations, and none of them pay attention
to the content of the commit message.

There's no benefit to dropping these votes when only the commit message
changes, only added latency and increased resource consumption, so stop
doing that. Do continue to drop it on rebases, since we rely on TryBots
to catch problems that may happen after conflict-free rebases.

If in the future we introduce checks that use the CL commit message as
an input, we can either revisit this decision or consider a different
mechanism for those checks.

Fixes go.dev/issue/30893.

Change-Id: I643436d5ed412ab171095a474652fbea3f0072da

project.config

diff --git a/project.config b/project.config
index 7b02c8b..a91243f 100644
--- a/project.config
+++ b/project.config
@@ -96,14 +96,14 @@
 	defaultValue = 0
 	value = 0 Don't test
 	value = +1 Run TryBots
-	copyCondition = changekind:NO_CHANGE
+	copyCondition = changekind:NO_CODE_CHANGE
 [label "TryBot-Result"]
 	function = NoBlock
 	defaultValue = 0
 	value = -1 TryBots failed
 	value = 0 No results
 	value = +1 TryBots succeeded
-	copyCondition = changekind:NO_CHANGE
+	copyCondition = changekind:NO_CODE_CHANGE
 [label "Auto-Submit"]
 	function = NoBlock
 	defaultValue = 0