Cache replaced topic names and shard ids in ByLogicalTableRouter SMT

Regexps are slow.
When using ByLogialTableRouter we're only operating on small amount of names to be replaced by regular expression.
Adding cache can speed up this a lot.

Sample values for different regexps (time in msec, 10M iterations):

(.*)(x|y)[.](.*)

• without cache: 42091
• with: 150

abc[.](x|y)[.](.*)

• without: 10540
• with: 88