YT-25206: Set up Cypress Transaction Service on Cypress Proxies

List of changes:
- Add a new extension to TReqHeader to save information about original cell tag and master channel kind. Previously, this information was passed to Cypress Proxy only in Execute request, now all requests that use channels to Cypress Proxies automatically save said information.
- Extract TCypressProxyServiceBase as an underlying class, which is responsible for extracting cell tag and master channel kind and saving it to context, and facilitating the handling of request redirection.
- Set up a (purely proxying) Cypress Transaction Service.
commit_hash:33341a0106832eb545678dec31f1aa9095fcdce0

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