Merge #151168

151168: generated: (mostly) ignore via .gitignore r=tbg a=wenyihu6

We will only check in selected tests (mostly to sanity
check that the infrastructure keeps working).

This is to avoid cluttering the repo.

Epic: none 
Release note: none 

Written-by: tbg <[email protected]>

Co-authored-by: Tobias Grieger <[email protected]>

Author: craig[bot]

pkg/kv/kvserver/asim/tests/testdata/generated/.gitignore

@@ -0,0 +1,7 @@
+# Ignore everything.
+*
+# This is needed so that the rule below can have an effect.
+!*/
+
+# Except this specific directory (relative to .gitignore)
+!example_rebalancing/**