Increase cacheContextLifetime to reduce false reports (#32011) (#32023)

Backport #32011 by @wolfogre

Replace #32001.

To prevent the context cache from being misused for long-term work
(which would result in using invalid cache without awareness), the
context cache is designed to exist for a maximum of 10 seconds. This
leads to many false reports, especially in the case of slow SQL.

This PR increases it to 5 minutes to reduce false reports.

5 minutes is not a very safe value, as a lot of changes may have
occurred within that time frame. However, as far as I know, there has
not been a case of misuse of context cache discovered so far, so I think
5 minutes should be OK.

Please note that after this PR, if warning logs are found again, it
should get attention, at that time it can be almost 100% certain that it
is a misuse.

Co-authored-by: Jason Song <i@wolfogre.com>

modules/cache/context_test.go

@@ -45,7 +45,7 @@ func TestWithCacheContext(t *testing.T) {
 		timeNow = now
 	}()
 	timeNow = func() time.Time {
-		return now().Add(10 * time.Second)
+		return now().Add(5 * time.Minute)
 	}
 	v = GetContextData(ctx, field, "my_config1")
 	assert.Nil(t, v)