Filter lambda names, cloudwatch log groups, ... using a search pattern

**Is your feature request related to a problem? Please describe.**

When there are lots lots of lambdas o cloudwatch log groups, It's a pain to have to keep scrolling and scrolling until you get to the entry you need. In many cases, I work with a specific set of lambdas (we call them a lambda family, and all of them share a prefix). I would like to have an option to reduce the time I need to locate them.

**Describe the solution you'd like**

If there were a input box where I can enter a search pattern so only the lambda names that match that pattern appear in the listing, it would be easier to locate the lambda I want to find among several hundreds that appear now. And the same for CloudWatch log groups. If the pattern were a regex, it would allow a more flexible solution. And the pattern should be resistant to restarts.

Start by locating the Lambda and CloudWatch log group listing views in the VS Code extension and inspect how their current resource lists and restart-persistent settings are handled. Define the search-pattern behavior, including regex matching, for both listings; done means matching entries are shown and the pattern remains after a restart.

Written by the indexing model from the issue text.