Add log reader helper

[tdmanv]

Change Overview

• Adds a helper to get logs w/ the follow=true

Pull request type

Please check the type of change your PR introduces:

• Work in Progress
• Refactoring (no functional changes, no api changes)
• Trival/Minor
• Bugfix
• Feature
• Documentation

Issues

• Continuous logs from spawned commands #231

Test Plan

=== RUN   Test
PASS: log_reader_test.go:41: LogReaderSuite.TestLogReader       0.000s
OK: 1 passed
--- PASS: Test (0.00s)
PASS
ok      github.com/kanisterio/kanister/pkg/kube 0.008s

• Manual
• Unit test
• E2E