Connect: fix access request searching logic

[kimlisa]

using the search bar in the list of access requests wasn't working and threw errors about accessing invalid fields.

the same web UI's matcher was updated about a year ago but of course teleterm got missed (😅 ). moved it into a shared file.

moved from here: https://github.com/gravitational/teleport.e/pull/4429

changelog: Fix input searching logic for Connect's access request listing view

[kimlisa]

should i include a changelog? no one complained for a year

[public-teleport-github-review-bot[bot]]

@kimlisa See the table below for backport results.

Branch	Result
branch/v14	Failed
branch/v15	Create PR
branch/v16	Create PR