Relates to KT-15562 "Service is dying".
This commit includes multiple changes:
1. JPS & Gradle daemon clients are refactored to use `connectAndLease` from `KotlinCompilerClient`.
`connectAndLease` was introduced in previous commits
2. `withKotlin` was removed because `connectAndLease` already covers retrying on connection error
3. Gradle flag files creation is changed:
* client-alive flag file lives as long as Gradle instance lives,
* session-alive flag file lives until the end of a build.
Original commit: 9d95c841a6
Alexey Tsvetkov
bf01fa4729